Dye-sensitized nanocrystalline thin film solar cell with light trapping structure

A solar cell and dye sensitization technology, applied in the field of solar cells, can solve the problems of reducing the adsorption of dye molecules, affecting the number of photogenerated electrons, and limited light absorption and utilization, and achieve excellent low-light power generation performance, low cost, and optimized photoelectric performance. Effect

Inactive Publication Date: 2011-11-23
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, this structure has limited absorption and utilization of light after all, and it cannot achieve the purpose of trapping light.
Moreover, the speci

Method used

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  • Dye-sensitized nanocrystalline thin film solar cell with light trapping structure
  • Dye-sensitized nanocrystalline thin film solar cell with light trapping structure
  • Dye-sensitized nanocrystalline thin film solar cell with light trapping structure

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Example Embodiment

[0036] Example 1

[0037] FTO conductive glass is used as a substrate, and anatase-type titanium dioxide (n=2.5) and rutile-type titanium dioxide (n=2.7) powders with different particle sizes are used to prepare the photoanode film.

[0038] The pretreatment of the conductive substrate: First, the conductive glass is sequentially washed in detergent, deionized water, and absolute ethanol, respectively, ultrasonically washed, the ultrasonic time is 10-30min, and dried at 50-100℃.

[0039] The preparation methods of various powders are as follows:

[0040] Preparation of anatase and rutile powder: Dissolve an appropriate amount of tetrabutyl titanate in absolute ethanol and add deionized water dropwise under stirring conditions until no white precipitate is produced. The white precipitate is washed, dried, divided into two parts, and calcined at 450°C and 700°C for 2h to obtain anatase and rutile titanium dioxide powders with particle diameters in the range of 100-700nm.

[0041] Rutile ...

Example Embodiment

[0046] Example 2

[0047] Using FTO conductive glass as the substrate, using anatase-type titanium dioxide (n=2.5) and rutile-type TiO 2 (n=2.7) Nanorods assembled microspheres to prepare a photoanode film. The preparation methods of various powders are as follows:

[0048] Dissolve an appropriate amount of tetrabutyl titanate in absolute ethanol, add deionized water dropwise under stirring conditions, until no white precipitate is produced. The white precipitate is washed, dried, and calcined at 450° C. for 2 hours to obtain anatase titanium dioxide powder with a particle size in the range of 100-700 nm. Take TiCl 4 Is the titanium source, hydrochloric acid solution is the solvent, and the rutile TiO is prepared by hydrothermal method 2 Microspheres assembled by nanorods, wherein the cross-sectional width of a single nanorod is 400-600nm, and the diameter of the assembled microspheres is about 7μm.

[0049] Use terpineol and ethyl cellulose as additives to prepare anatase titanium...

Example Embodiment

[0050] Example 3

[0051] FTO conductive glass is used as the substrate, and tin dioxide (n=2.0), anatase titanium dioxide (n=2.5) and rutile titanium dioxide (n=2.7) powders are used to prepare the photoanode film. The preparation methods of various powders are as follows:

[0052] Dissolve an appropriate amount of tetrabutyl titanate in absolute ethanol, add deionized water dropwise under stirring conditions, until no white precipitate is produced. The white precipitate is washed, dried, divided into two parts, and calcined at 450°C and 700°C for 2h to obtain anatase and rutile titanium dioxide powders with particle diameters in the range of 100-700nm. Take appropriate amount of SnCl 4 ·5H 2 O is dissolved in PEG200, and after calcination, tin dioxide powder with a particle size of about 500 nm is obtained. Using terpineol and ethyl cellulose as additives, the above powders are respectively configured into a slurry with a solid content of 20%, wherein the tin dioxide slurry is ...

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Abstract

The invention discloses a dye-sensitized nanocrystalline thin film solar cell with a light trapping structure. The dye-sensitized nanocrystalline thin film solar cell with the light trapping structure comprises a photo-anode, electrolyte and a counter electrode, wherein the photo-anode mainly comprises a conductive substrate and a nanocrystalline film; the nanocrystalline film consists of at least one layer of unit thin film; each layer of unit thin film is formed by laminating more than three layers of nanocrystalline thin films with different refractive indexes; and the light refractive indexes of the nanocrystalline thin films of the outmost layers on the two sides of the unit thin film are lower than the light refractive index of each nanocrystalline thin film of the inner layer of the unit thin film, and the light refractive indexes of each nanocrystalline thin film of the inner layer are gradually increased or gradually increased and then gradually decreased along a light projection direction. The cell provided by the invention fulfills the aim of trapping light by the scattering and complete reflection of light, is prepared from a wide range of materials by a simple preparation method, has a wide application range and can greatly enhance the light absorption and utilization of the thin films, thereby greatly optimizing the photoelectric conversion efficiency of the cell.

Description

technical field [0001] The invention belongs to the field of solar cells, and mainly relates to a dye-sensitized nanocrystalline solar cell with a light-trapping structure and a preparation method thereof. Background technique [0002] Facing the severe environment, energy crisis and global energy conservation and emission reduction requirements, it is urgent to find new energy sources. As an inexhaustible and inexhaustible renewable clean energy, solar energy has attracted more and more attention from various countries. Solar cells, which directly convert light energy into electrical energy, are one of the most efficient ways to utilize solar energy. At present, the most mature research technology is silicon solar cells, and industrialized production has been realized, but its high cost and cumbersome preparation process limit its large-scale application. As a new generation of solar cells, dye-sensitized nanocrystalline solar cells (DSSCs) have attracted people's attenti...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/20H01M14/00H01L51/42H01L51/44H01L51/48
CPCY02E10/50Y02E10/542Y02E10/549Y02P70/50
Inventor 周幸福潘浩
Owner NANJING UNIV OF TECH
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