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Preparation method of quantum dot sensitized solar cell light cathode

A technology for sensitization of solar cells and quantum dots, which is applied in the field of new materials for chemical solar cells, can solve problems such as hindering the transmission of photogenerated electrons, affecting the long-term stability of cells, and achieves reduction of photogenerated electron transport performance, improvement of stability, and preparation method. simple effect

Active Publication Date: 2016-04-13
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively sensitize the titanium dioxide nanocrystalline photoanode, but the bridging agent used is usually an organic substance, which will affect the long-term stability of the battery, hinder the transmission of photogenerated electrons, and cause dark reactions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The method for preparing a photoanode of a quantum dot sensitized solar cell of the present invention includes the following steps:

[0018] The first step is to disperse the commercially available titanium dioxide quantum dots and antimony selenide quantum dots each containing an oleic acid stabilizer with a particle size of 3.6 nm in 100 mL cyclohexane to form titanium dioxide quantum dots with a concentration of 0.05 mol / L. Cyclohexane solution and cyclohexane solution of antimony selenide quantum dots with a concentration of 0.05 mol / L;

[0019] The second step is to mix 70 mL of the titanium dioxide quantum dot cyclohexane solution with a concentration of 0.05 mol / L and 30 mL of the antimony selenide quantum dot cyclohexane solution with a concentration of 0.05 mol / L to the obtained quantum dot oil phase mixture. 200mL of acetone was added to make the titanium dioxide quantum dots and antimony selenide quantum dots co-precipitated to form spherical titanium dioxide-anti...

Embodiment 2

[0023] The method for preparing a photoanode of a quantum dot sensitized solar cell of the present invention includes the following steps:

[0024] In the first step, commercially available titanium dioxide quantum dots with a particle size of 5 nm containing oleic acid stabilizer and copper indium sulfur quantum dots with a particle size of 3 nm containing oleic acid stabilizer were dispersed in 100 mL of toluene to form a concentration of 0.05 mol / L. Titanium dioxide quantum dot toluene solution and copper indium sulfur quantum dot toluene solution with a concentration of 0.05 mol / L;

[0025] In the second step, 60mL of 0.05mol / L titanium dioxide quantum dot toluene solution and 40mL copper indium sulfur quantum dot toluene solution with a concentration of 0.05mol / L are mixed uniformly, and 200mL methanol is added to the obtained quantum dot oil phase mixture. , Co-precipitating titanium dioxide quantum dots and copper indium sulfur quantum dots to form spherical titanium dioxide...

Embodiment 3

[0029] The method for preparing a photoanode of a quantum dot sensitized solar cell of the present invention includes the following steps:

[0030] In the first step, commercially available titanium dioxide quantum dots with a particle size of 6nm and antimony sulfide quantum dots with a particle size of 2nm, both containing oleic acid stabilizer, were dispersed into 100mL of octane to form titanium dioxide quantum dots with a concentration of 0.05mol / L. Alkane solution and antimony sulfide quantum dot octane solution with a concentration of 0.05 mol / L;

[0031] In the second step, mix 50mL of 0.05mol / L titanium dioxide quantum dot octane solution and 50mL of 0.05mol / L antimony sulfide quantum dot octane solution, and add 200mL to the obtained quantum dot oil phase mixture. Ethanol can co-precipitate titanium dioxide quantum dots and antimony sulfide quantum dots to form spherical titanium dioxide-antimony sulfide quantum dot aggregates with a particle size of 0.1-0.5 μm;

[0032] T...

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Abstract

The invention discloses a preparation method of a quantum dot sensitized solar cell light cathode. The preparation method comprises the following steps: firstly dispersing titanium dioxide quantum dots and one of sulfur / selenium / antimony telluride quantum dots, copper-indium sulfide quantum dots, copper-indium-selenium quantum dots, copper-zinc-tin-sulfur quantum dots and copper-zinc-tin-selenium quantum dots which contain an oleic acid or oleylamine stabilizer in a same non-polar solvent respectively to form oil-phase solutions; then uniformly mixing two oil-phase solutions, and adding a solar solvophobic solvent so that the titanium dioxide quantum dots and chalcogenide quantum dots are coprecipitated to form a titanium dioxide-chalcogenide quantum dot aggregate; and finally coating the titanium dioxide-chalcogenide quantum dot aggregate on conducting glass through titanium tetrachloride treatment, and carrying out heat treatment under an argon atmosphere to form the quantum dot sensitized solar cell light cathode. The preparation method disclosed by the invention is simple, the stability and light-induced electron transmission performance of a quantum dot sensitized solar cell can be obviously improved, and the dark reaction of the cell is reduced.

Description

Technical field [0001] The invention relates to the field of new materials for chemical solar cells, in particular to a method for preparing photoanodes of quantum dot sensitized solar cells. Background technique [0002] Quantum dot sensitized solar cells are a new type of chemical solar cells that use inorganic semiconductor compound quantum dot materials as sensitizers, and their working principle is similar to that of dye-sensitized solar cells. It has the characteristics of low cost, simple preparation process and environmental friendliness, so it has good application prospects and is expected to replace existing high-cost solar cells. [0003] The photoanode is a key component of the quantum dot sensitized solar cell, which absorbs sunlight, performs photoelectric conversion, and transmits photogenerated electrons. The performance of the photoanode of quantum dot sensitized solar cells is mainly determined by the electron transport material, quantum dot sensitizer and the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042H01G9/048H01L51/48H01L51/46H01L51/44
CPCH01G9/042H01G9/048H01G9/20H10K30/81Y02E10/549
Inventor 兰章吴季怀
Owner HUAQIAO UNIVERSITY
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