CN106098374B - A kind of display device with solar cell - Google Patents

Abstract

The present application relates to a display device with a solar cell, comprising: a backlight module, which provides a backlight to the display device; a solar cell, arranged above the backlight module to receive the backlight; a display panel, arranged above the solar cell to accept the backlight that penetrates the solar cell.

Description

A display device with solar cells

technical field

The present application relates to the display field, in particular to a display device with solar cells.

Background technique

Solar technology refers to technologies that convert sunlight into electricity, which can then be used to drive various electronic devices. Solar energy is an inexhaustible and harmless source of energy, and harnessing it has many benefits. For example, solar energy can be used to generate electricity without creating pollution such as air pollution, noise pollution, or greenhouse gases. In addition, solar energy can be harnessed anywhere that receives sunlight and does not require fuel transportation or the use of generators. As a result, the use of solar energy has become more common in today's society.

However, the energy conversion efficiency of solar energy is low, with the result that technologies utilizing solar energy may include large equipment sizes. In addition, electricity obtained using solar energy may be unstable according to the intensity of received sunlight and the incident angle of received sunlight.

Contents of the invention

In order to overcome the problems in the related art, the present application provides a display device with solar cells.

The application is realized through the following technical solutions:

A display device with a solar cell, comprising:

a backlight module, providing a backlight source for the display device;

a solar cell arranged above the backlight module to receive the backlight;

The display panel is arranged above the solar cell to receive the backlight penetrating the solar cell.

Preferably, the backlight module, the solar cell and the display panel are connected, and the solar cell provides electric energy for the display panel.

Preferably, the backlight module includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, the solar cell is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 100nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) Preparation of transition layer: Magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, which is used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

1. For the dye-sensitized solar cell in the display device of this application, because TiO2 nanoparticles are used as the carrier of the dye in the traditional dye-sensitized solar cell, although the particle structure has a large specific surface area, due to the existence of the interface between the particles, the electrons in the The transmission between particles will go through numerous interfaces, which weakens the transmission rate of electrons in the transmission process; the photoanode structure in the dye-sensitized solar cell of the present invention is a three-dimensional grid nanostructure of tungsten trioxide directly grown on a transparent conductive film, It has a direct electron transfer channel, and electrons can be collected to the electrode along the three-dimensional nanogrid. At the same time, because tungsten trioxide nanomaterials are wide-bandgap semiconductor materials and have high conductivity, they are greatly improved in terms of structure and materials. Improved electron transfer efficiency.

2. The three-dimensional grid nanostructure of tungsten trioxide has a large specific surface area, which can greatly improve the adsorption efficiency of dyes. The dyes are excited by light to generate electrons. Sufficient dye adsorption can generate a large number of photons, increase the photocurrent density, and thus improve conversion efficiency of sunlight.

3. A layer of Cr metal is added between the FTO substrate of the photoanode and the tungsten trioxide three-dimensional grid nanostructure, which acts as a transition layer for electron conduction, avoiding the large contact resistance between the nanostructure and the substrate. In addition, in Nano-silver particles are added to the electrolyte, and the nano-silver particles help to scatter sunlight in the electrolyte, increase the probability of dye absorption, and improve photoelectric conversion efficiency.

4. In the improved photoanode structure designed in the present invention, the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method. The preparation method is simple, low in cost, and has the potential for a wide range of practical applications.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic structural diagram of a display device described in the present application, wherein 1—backlight module, 2—solar cell, and 3—display panel.

Fig. 2 is a flow chart of the manufacturing method of the dye-sensitized solar cell in the display device of the present application.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the application may repeat reference numbers and/or letters in different instances. This repetition is for simplicity and clarity and is not, in itself, the relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials. In addition, the structure described below in which the first feature is "on" the value of the second feature may include embodiments where the first and second features are formed in direct contact, and may include additional features formed between the first and second features For example, such that the first and second features may not be in direct contact.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations.

Energy is the material that provides energy conversion to nature and is the material basis of human activities. Clean energy, also known as green energy, refers to those energy sources that do not emit pollutants, including water energy, wind energy, solar energy, biomass energy, nuclear energy, geothermal energy, etc. Clean energy is environmentally friendly, with less emissions and less pollution. Small. At present, the development and utilization of clean energy is becoming the unanimous appeal of the global community.

Solar clean energy is to convert the sun's light energy into thermal energy, electric energy and other forms, and no other pollution will be generated during the energy conversion process. At present, silicon-based solar energy is most used, and its photoelectric conversion efficiency is relatively high. However, the purification process of silicon will cause environmental pollution, and the manufacturing process of silicon-based solar cells is complicated and expensive.

In the big family of solar cells, dye-sensitized solar cells belong to organic-inorganic hybrid cells. This type of cell consists of a photoanode, a counter electrode, and an electrolyte sandwiched between them to form a sandwich structure; among them, the photoanode is generally made of transparent The electrode and the TiO2 nano film on its surface are composed of dyes adsorbed on the TiO2 nano film, and the dyes are mainly used to absorb solar energy; the counter electrode is generally composed of an electrode and a catalytic film on its surface, and the catalytic film is generally Pt metal. Dye-sensitized solar cells have the advantages of simple technology and low cost. In the study of dye-sensitized solar cells, the material and structure of the photoanode play a great role in improving the conversion efficiency of photoelectricity.

Metal tungsten belongs to the transition metal. Tungsten trioxide is the highest oxidation state of tungsten, which fully satisfies the stoichiometric ratio. Tungsten trioxide is a typical wide-bandgap semiconductor functional material, which is used in gas detection, light, electrochromism, photocatalysis , Electrochemical and other aspects have excellent performance.

Below in conjunction with embodiment the present invention will be further described.

Embodiment one:

From Fig. 1, an embodiment of the present application relates to a display device with solar cells, comprising:

A backlight module 1, which provides a backlight source for the display device;

a solar cell 2, arranged above the backlight module 1 to receive the backlight;

The display panel 3 is arranged above the solar cell 2 to receive the backlight penetrating the solar cell.

Preferably, the backlight module 1 , the solar cell 2 and the display panel 3 are connected, and the solar cell 2 provides electric energy for the display panel 3 .

Preferably, the backlight module 1 includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, said solar cell 2 is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 100nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, referring to Figure 2, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) Preparation of transition layer: Magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, which is used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

Preferably, in the dye-sensitized solar cell, a layer of tungsten trioxide grid structure is grown on the FTO substrate through hydrothermal growth, wherein when the content of tungsten hexachloride is 30 mmol, the thickness of the nano grid is 6 μm. The three-dimensional structure of the tungsten oxide nanostructure is in the shape of a hollow network, in which the diameter of the grid structure is 40nm, and a large number of dye molecules can be adsorbed and hidden in the middle, and the dye adsorption amount is 0.189×10-6mol/cm2.

The photoelectric conversion test was carried out on the dye cell structure of the present invention. The test condition was AM1.5 optical power density 100mW/cm2. The test found that the short-circuit current was 15.4mA/cm2, the open-circuit voltage was 0.5V, and the photoelectric conversion efficiency reached 9.2%. Anti-fatigue test, in the case of continuous testing for 1000h, the photoelectric conversion efficiency has dropped by 3.4%, and the working stability is good.

Through testing, the display device of the present invention has a simple preparation process, strong fatigue resistance, high photoelectric conversion efficiency, and has certain practical application potential.

Embodiment two:

From Fig. 1, an embodiment of the present application relates to a display device with solar cells, comprising:

A backlight module 1, which provides a backlight source for the display device;

a solar cell 2, arranged above the backlight module 1 to receive the backlight;

The display panel 3 is arranged above the solar cell 2 to receive the backlight penetrating the solar cell.

Preferably, the backlight module 1 , the solar cell 2 and the display panel 3 are connected, and the solar cell 2 provides electric energy for the display panel 3 .

Preferably, the backlight module 1 includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, said solar cell 2 is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 50nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, referring to Figure 2, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) Preparation of transition layer: Magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, which is used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

Preferably, in the dye-sensitized solar cell, a layer of tungsten trioxide grid structure is grown on the FTO substrate through hydrothermal growth, wherein when the content of tungsten hexachloride is 40 mmol, the thickness of the nano grid is 5 μm. The three-dimensional nanostructure of tungsten trioxide is in the shape of a hollow network, in which the diameter of the grid structure is 40nm, and a large number of dye molecules can be adsorbed and hidden in the middle, and the dye adsorption amount is 0.189×10-6mol/cm2.

The photoelectric conversion test was carried out on the dye cell structure of the present invention. The test condition was AM1.5 optical power density 100mW/cm2. The test found that the short-circuit current was 15.4mA/cm2, the open-circuit voltage was 0.6V, and the photoelectric conversion efficiency reached 8.3%. Anti-fatigue test, in the case of continuous test for 1000h, the photoelectric conversion efficiency has dropped by 3.5% compared with that, and the working stability is better.

Through testing, the display device of the present invention has a simple preparation process, strong fatigue resistance, high photoelectric conversion efficiency, and has certain practical application potential.

Embodiment three:

From Fig. 1, an embodiment of the present application relates to a display device with solar cells, comprising:

A backlight module 1, which provides a backlight source for the display device;

a solar cell 2, arranged above the backlight module 1 to receive the backlight;

The display panel 3 is arranged above the solar cell 2 to receive the backlight penetrating the solar cell.

Preferably, the backlight module 1 , the solar cell 2 and the display panel 3 are connected, and the solar cell 2 provides electric energy for the display panel 3 .

Preferably, the backlight module 1 includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, said solar cell 2 is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 50nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, referring to Figure 2, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) Preparation of transition layer: Magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, which is used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

Preferably, in the dye-sensitized solar cell, a layer of tungsten trioxide grid structure is grown on the FTO substrate through hydrothermal growth, wherein when the content of tungsten hexachloride is 70 mmol, the thickness of the nano grid is 7 μm. The three-dimensional nanostructure of tungsten trioxide is in the shape of a hollow network, in which the diameter of the grid structure is 40nm, and a large number of dye molecules can be adsorbed and hidden in the middle, and the dye adsorption amount is 0.189×10-6mol/cm2.

The photoelectric conversion test was carried out on the dye cell structure of the present invention. The test condition was AM1.5 optical power density 100mW/cm2. The test found that the short-circuit current was 15.4mA/cm2, the open-circuit voltage was 0.6V, and the photoelectric conversion efficiency reached 7.8%. Anti-fatigue test, in the case of continuous testing for 1000h, the photoelectric conversion efficiency has dropped by 5.1%, and the working stability is good.

Through testing, the display device of the present invention has a simple preparation process, strong fatigue resistance, high photoelectric conversion efficiency, and has certain practical application potential.

Embodiment four:

From Fig. 1, an embodiment of the present application relates to a display device with solar cells, comprising:

A backlight module 1, which provides a backlight source for the display device;

a solar cell 2, arranged above the backlight module 1 to receive the backlight;

The display panel 3 is arranged above the solar cell 2 to receive the backlight penetrating the solar cell.

Preferably, the backlight module 1 , the solar cell 2 and the display panel 3 are connected, and the solar cell 2 provides electric energy for the display panel 3 .

Preferably, the backlight module 1 includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, said solar cell 2 is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 50nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, referring to Figure 2, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) preparation of transition layer: magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

Preferably, in the dye-sensitized solar cell,

After hydrothermal growth, a layer of tungsten trioxide grid structure is grown on the FTO substrate, and when the content of tungsten hexachloride is 90 mmol, the thickness of the nano grid is 10 μm. The three-dimensional nanostructure of tungsten trioxide is in the shape of a hollow network, in which the diameter of the grid structure is 40nm, and a large number of dye molecules can be adsorbed and hidden in the middle, and the dye adsorption amount is 0.189×10-6mol/cm2.

The photoelectric conversion test was carried out on the dye cell structure of the present invention. The test condition was AM1.5 optical power density 100mW/cm2. The test found that the short-circuit current was 15.4mA/cm2, the open-circuit voltage was 0.6V, and the photoelectric conversion efficiency reached 7.3%. Anti-fatigue test, in the case of continuous test for 1000h, the photoelectric conversion efficiency has dropped by 3.1% compared with that, and the working stability is good.

Through testing, the display device of the present invention has a simple preparation process, strong fatigue resistance, high photoelectric conversion efficiency, and has certain practical application potential.

Embodiment five:

From Fig. 1, an embodiment of the present application relates to a display device with solar cells, comprising:

A backlight module 1, which provides a backlight source for the display device;

a solar cell 2, arranged above the backlight module 1 to receive the backlight;

The display panel 3 is arranged above the solar cell 2 to receive the backlight penetrating the solar cell.

Preferably, the backlight module 1 , the solar cell 2 and the display panel 3 are connected, and the solar cell 2 provides electric energy for the display panel 3 .

Preferably, the backlight module 1 includes a light shield, a light source, a diffusion sheet and a prism sheet.

Preferably, said solar cell 2 is based on a dye-sensitized solar cell.

Preferably, the dye-sensitized solar cell consists of a photoanode, a counter electrode, and an electrolyte; structure and dye molecules; the transition layer is a Cr film transition layer; the thickness of the tungsten trioxide seed layer is 50nm; the tungsten trioxide three-dimensional grid nanostructure is prepared by a hydrothermal method.

Preferably, referring to Figure 2, the preparation process of the dye-sensitized solar cell is as follows:

S1, preparation of photoanode

a) Clean the FTO substrate: There will be oil, dust and other pollution on the surface of the FTO conductive glass. First, take a FTO conductive glass of a certain size (10cm×10cm), put its conductive side up into the detergent solution, and ultrasonically clean it for 30 minutes. Then rinse repeatedly with deionized water several times until the detergent is cleaned. Then, put the FTO conductive glass into acetone, ethanol, and deionized water for 20 minutes, and then dry it with a nitrogen gun for use;

b) Preparation of transition layer: Magnetron sputtering a layer of Cr film on the surface of the cleaned FTO conductive glass, which is used as a transition layer between the tungsten trioxide three-dimensional grid structure and the FTO conductive glass, and the thickness of the Cr film is 50nm;

c) Preparation of tungsten trioxide seed layer: Take 0.1mol of sodium tungstate, 0.06mol of diethanolamine and 100ml of absolute ethanol solution, put it into a beaker, stir magnetically at room temperature for 30min, make it fully mixed, and then put the beaker Put it in an 80°C oil bath for 6 hours with magnetic stirring to obtain a seed solution; take the FTO conductive glass cleaned in step 1, slowly put it into the seed solution, let it stand for 3 minutes, and then pull out the FTO conductive glass slowly, keeping the pulling speed 0.05cm/s, then put the pulled out FTO conductive glass into an oven for drying, and finally put the FTO conductive glass into a muffle furnace for annealing at 300°C for 5h, and the heating rate during the heating process is 5°C/min;

d) Growth of tungsten trioxide three-dimensional grid nanostructure: prepare a mixed solution containing tungsten hexachloride, 30mmol sodium tungstate, 45mmol hexamethylenetetramine and 200ml deionized water, add 5ml ammonia water dropwise and stir, then Transfer it to the inner tank of the autoclave; take the FTO conductive glass covered with the tungsten trioxide seed layer and lean against the solution in the inner tank of the autoclave, place the conductive side down, and after sealing, put the autoclave into the solution that has been heated to 95 In an oven at ℃, react for 24 hours. After the reaction is complete, it is naturally lowered to room temperature. Take out the FTO conductive glass and wash it with deionized water for 30 seconds to obtain a photoanode with a three-dimensional grid nanostructure of tungsten trioxide;

S2, preparation of electrolyte and dye:

The electrolyte uses the traditional iodine/iodine trianion electrolyte, first weigh 100ml of acetonitrile solution, add 0.1mol of lithium iodide, 0.1mol of elemental iodine, 0.6mol of 4-tert-butylpyridine and 0.6mol of tetrabutyl ammonium iodide, avoid light and ultrasonically 5min to make it fully dissolved; then weigh 5g of nano-silver particles, add it to the mixed solution, and mix thoroughly;

Dye solution: Weigh 50mg of N719 powder and 30ml of absolute ethanol, add N719 into absolute ethanol, fully dissolve, and stir for 12 hours in the dark;

S3, package:

Put the dye solution prepared in step S2 into a brown glass dish, then put the photoanode with the tungsten trioxide three-dimensional grid nanostructure into the brown glass dish, sensitize at 60°C for 3 hours in the dark, take it out, and put FTO conductive glass of the same size with a Pt catalytic layer is packaged together with the photoanode, the packaging material is a heat-sealing film, the electrolyte is injected from the small hole at one end of the counter electrode, the small hole is packaged, and the wire is connected to form the improvement of the present invention type dye-sensitized solar cells.

Preferably, in the dye-sensitized solar cell, a layer of tungsten trioxide grid structure is grown on the FTO substrate through hydrothermal growth, wherein when the content of tungsten hexachloride is 120 mmol, the thickness of the nano grid is 15 μm. The three-dimensional nanostructure of tungsten trioxide is in the shape of a hollow network, in which the diameter of the grid structure is 40nm, and a large number of dye molecules can be adsorbed and hidden in the middle, and the dye adsorption amount is 0.189×10-6mol/cm2.

The photoelectric conversion test was carried out on the dye cell structure of the present invention. The test condition was AM1.5 optical power density 100mW/cm2. The test found that the short-circuit current was 15.4mA/cm2, the open-circuit voltage was 0.6V, and the photoelectric conversion efficiency reached 6.5%. Anti-fatigue test, in the case of continuous test for 1000h, the photoelectric conversion efficiency has dropped by 3.1% compared with that, and the working stability is good.

Through testing, the display device of the present invention has a simple preparation process, strong fatigue resistance, high photoelectric conversion efficiency, and has certain practical application potential.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in this application . The specification and examples are to be considered exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It should be understood that the present invention is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (2)

1. a kind of display device with solar cell, which is characterized in that including：

Backlight module provides backlight and gives the display device；

Solar cell is arranged on above the backlight module to receive the backlight；

Display panel is arranged on above solar cell to receive to penetrate the backlight of the solar cell；The backlight module, Solar cell is connected with display panel, and the solar cell provides the electric energy of the display panel；The solar cell Based on dye-sensitized solar cells；The dye-sensitized solar cells are formed by light anode, to electrode and electrolyte；The light sun Pole is followed successively by FTO substrates, transition zone, tungstic acid Seed Layer, tungstic acid three-dimensional grid nanostructured and dyestuff from outside to inside Molecule；The transition zone is Cr film transition zones；The tungstic acid seed layer thickness is 100nm；The tungstic acid three dimensional network Lattice nanostructured is prepared using hydro-thermal method；The preparation process of the dye-sensitized solar cells is as follows：

S1 prepares light anode

A) FTO substrates are cleaned：The FTO electro-conductive glass of 10cm × 10cm is taken first, its conduction is put into liquid detergent solution up In, it is cleaned by ultrasonic 30min, is then rinsed repeatedly with deionized water for several times, until liquid detergent is cleaned up, then, FTO is led Electric glass is sequentially placed into acetone, ethyl alcohol, deionized water is cleaned by ultrasonic 20min respectively, is dried up with nitrogen gun for use；

B) transition zone is prepared：One layer of Cr film of FTO conductive glass surfaces magnetron sputtering after cleaning, as tungstic acid three-dimensional The transition zone of network and FTO electro-conductive glass, Cr film thicknesses are 50nm；

C) tungstic acid Seed Layer is prepared：Take the sodium tungstate of 0.1mol, the diethanol amine of 0.06mol and 100ml absolute ethyl alcohols molten Liquid is put it into beaker, in room temperature magnetic agitation 30min, is sufficiently mixed it, and beaker then is put into magnetic in 80 DEG C of oil baths Power stirs 6h, obtains seed solution；The FTO electro-conductive glass of step b is slowly entered in seed solution, 3min is stood, then delays Slow to pull out FTO electro-conductive glass, it is 0.05cm/s to keep pulling out speed, and then the FTO electro-conductive glass of pull-out is put into baking oven and is dried It is dry, FTO electro-conductive glass is finally put into 300 DEG C of annealing 5h in Muffle furnace, heating rate is 5 DEG C/min wherein in temperature-rise period；

D) tungstic acid three-dimensional grid nanostructured is grown：Preparation contains tungsten hexachloride, 30mmol sodium tungstates, six times of 45mmol The deionized water mixed solution of tetramine and 200ml, wherein, tungsten hexachloride content for 30mmol or 40mmol or 70mmol or 90mmol or 120mmol is added dropwise 5ml ammonium hydroxide and stirs, transfers it in autoclave liner；It takes and covers three and have oxidation The FTO electro-conductive glass inclination of tungsten Seed Layer is leaned against in the solution of autoclave liner, conductive placed face down, after sealing, by high pressure Kettle, which is put into, to be warming up in 95 DEG C of baking oven, and reaction for 24 hours, is down to room temperature naturally after the reaction was complete, take out FTO electro-conductive glass, 30s is rinsed with deionized water, obtaining growth has the light anode of tungstic acid three-dimensional grid nanostructured；

S2 prepares electrolyte and dyestuff：

Electrolyte applies traditional three anion electrolyte of iodine/iodine, weighs the acetonitrile solution of 100ml first, adds in thereto The tetrabutylammonium iodide of the lithium iodide of 0.1mol, 0.1mol iodines, 0.6mol 4- tert .-butylpyridines and 0.6mol, are protected from light super Sound 5min, makes it fully dissolve；Then the nano silver particles of 5g are weighed, are added into mixed solution, are sufficiently mixed；

Dye solution：N719 powder 50mg, absolute ethyl alcohol 30ml are weighed, N719 is added in absolute ethyl alcohol, fully dissolves, is protected from light Stir 12h；

S3, encapsulation：

The dye solution prepared in step S2 is taken to be put into brown glass ware, growth is then had into tungstic acid three-dimensional grid nanometer The light anode of structure enters in the brown glass ware, is protected from light and is sensitized 3h at 60 DEG C, takes out, then by the phase with Pt Catalytic Layers It is packaged together with size FTO electro-conductive glass and the light anode, encapsulating material uses heat-sealing film, by electrolyte to electrode one end Aperture injection, encapsulate aperture, connecting wire, formed modified dye-sensitized solar cells.

2. display device according to claim 1, which is characterized in that the backlight module include a light barrier, a light source, One diffusion sheet and a prismatic lens.