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Method for preparing sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode

A porous titanium dioxide and co-sensitization technology, applied in the field of solar cells, can solve the problems of inconvenient multi-quantum dot co-sensitization, not using battery optimization, rough methods, etc., to achieve improved photoelectric conversion efficiency, energy conversion efficiency, The effect of cheap raw materials

Inactive Publication Date: 2012-01-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is too cumbersome and inconvenient to co-sensitize multiple quantum dots;

Method used

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  • Method for preparing sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode
  • Method for preparing sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode
  • Method for preparing sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Burn FTO to 450°C, spray 0.2mol / L isopropanol solution of diisopropyl di(acetylacetonate) titanate, keep it warm for 5 minutes, screen print titanium dioxide slurry after cooling, and burn at 450°C for 60 Minutes, the thickness is about 3 microns.

[0028] (2) Configure 0.45mol / L Cd(NO 3 ) 2 and 0.05mol / L Pb(NO 3 ) 2 The mixed aqueous solution A, 0.5mol / L Na 2 S methanol solution B, soak the porous titanium dioxide membrane in A for 5 minutes, rinse with ultrapure water, dry, soak in B for 5 minutes, rinse with methanol, dry, repeat 5 times. Vacuum drying at 100℃ for 1.5h to prepare sulfide quantum dot co-deposition sensitized porous titanium dioxide electrode TiO 2 / CdPbS(5).

[0029] figure 1 It is a SEM-EDAX photo of the cross-section of lead sulfide and cadmium sulfide quantum dots on the titanium dioxide film. It can be seen from the figure that there are sulfur elements, lead elements and cadmium elements, which fully demonstrates the formation of lead ...

Embodiment 2

[0031] (1) Burn FTO to 400°C, spray 0.1mol / L isopropanol solution of diisopropyl di(acetylacetonate) titanate, keep it warm for 20 minutes, screen print titanium dioxide slurry after cooling, and burn at 480°C for 40 Minutes, the thickness is about 3 microns.

[0032] (2) Configure 0.45mol / L Cd(NO 3 ) 2 and 0.05mol / L Pb(NO 3 ) 2 The mixed aqueous solution A, 0.5mol / L Na 2 S methanol solution B, soak the porous titanium dioxide membrane in A for 5 minutes, rinse with ultrapure water, dry, soak in B for 5 minutes, rinse with methanol, dry, repeat 4 times. Vacuum drying at 100℃ for 1.5h to prepare sulfide quantum dot co-deposition sensitized porous titanium dioxide electrode TiO 2 / CdPbS(4).

Embodiment 3

[0034] (1) Burn FTO to 500°C, spray 0.4mol / L isopropanol solution of diisopropyl di(acetylacetonate) titanate, keep it warm for 10 minutes, screen print titanium dioxide slurry after cooling, and burn at 500°C for 30 Minutes, the thickness is about 3 microns.

[0035] (2) Configure 0.45mol / L Cd(NO 3 ) 2 and 0.05mol / L Pb(NO 3 ) 2 The mixed aqueous solution A, 0.5mol / L Na 2 S methanol solution B, soak the porous titanium dioxide membrane in A for 5 minutes, rinse with ultrapure water, dry, soak in B for 5 minutes, rinse with methanol, dry, repeat 6 times. Vacuum drying at 100℃ for 1.5h to prepare sulfide quantum dot co-deposition sensitized porous titanium dioxide electrode TiO 2 / CdPbS(6).

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Abstract

The invention discloses a method for preparing a sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode by chemical bath co-deposition. The method comprises the following steps: preparing a TiO2 dense layer and a TiO2 porous film with a certain thickness on FTO (fluorine-doped tin oxide) glass; preparing two or more soluble metal salt solutions with a certain concentration, and sodium sulfide solution with a certain concentration; generating two or more sulfide quantum dots on the porous TiO2 film in situ by a chemical co-deposition method; and preparing the sulfide quantum dot co-sensitization porous titanium dioxide photoelectrode. The method is simple and quick; and when solar cells are prepared from the photoelectrode prepared according to the invention, the photoelectric conversion performance of the cells can be improved.

Description

technical field [0001] The invention belongs to solar cell technology, and in particular relates to a method for preparing quantum dot co-sensitized porous titanium dioxide photoelectrodes by chemical bath co-deposition. Background technique [0002] The increasing severity of the global energy crisis has drawn the attention of countries all over the world to the research of solar cells. Among them, dye-sensitized solar cells have become a research hotspot because of their low cost and easy fabrication. Quantum dots are used as sensitizers because of their unique photoelectric properties and low cost, and quantum dot-sensitized solar cells have higher theoretical efficiencies than dye-sensitized solar cells. However, the current energy conversion efficiency of quantum dot-sensitized solar cells is still very low. Therefore, researchers have tried various methods to improve the conversion efficiency of this type of battery. Studies have shown that co-sensitization of quantu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/20H01M14/00H01L51/48
CPCY02E10/50Y02E10/549
Inventor 赵元弟韩宏伟舒婷周子明汪恒刘光辉向鹏
Owner HUAZHONG UNIV OF SCI & TECH
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