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Indium-doped cadmium sulfide quantum dot sensitizer used for solar cell and manufacturing method

A solar cell and quantum dot sensitization technology, which is applied in the field of solar energy to achieve the effects of rapid separation, suppression of dark current, improvement of short-circuit current and photoelectric conversion efficiency

Inactive Publication Date: 2014-06-11
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the work of CdS-doped In as a sensitizer in PbS / CdS co-sensitized solar cells to improve the short-circuit current of QDSSCs by SILAR method has not been reported so far.

Method used

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  • Indium-doped cadmium sulfide quantum dot sensitizer used for solar cell and manufacturing method
  • Indium-doped cadmium sulfide quantum dot sensitizer used for solar cell and manufacturing method
  • Indium-doped cadmium sulfide quantum dot sensitizer used for solar cell and manufacturing method

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Experimental program
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Effect test

Embodiment 1

[0029] The specific steps of the indium-doped cadmium sulfide quantum dot sensitizer for solar cells and the preparation method are:

[0030] 1) Equipped with Pb(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0031] 2) The photoanode material TiO to be sensitized 2 Immerse the Pb(NO) prepared in step 1) 3 ) 2 In the solution for 1min, take it out and dry it with nitrogen;

[0032] 3) Immerse the photoanode material obtained in step 2) into the Na prepared in step 1) 2 In the S solution for 1min, take it out and dry it with nitrogen gas, and then form a PbS semiconductor quantum dot sensitizer layer on the photoanode material;

[0033] 4) Equipped with Cd(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0034] 5) Add InCl 3 The solution is added to step 4) equipped with Cd(NO 3 ) 2 solution, where In 3+ with Cd 2+ The ratio of t...

Embodiment 2

[0039] The specific steps of the indium-doped cadmium sulfide quantum dot sensitizer for solar cells and the preparation method are:

[0040] 1) Equipped with Pb(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0041] 2) The photoanode material TiO to be sensitized 2 Immerse the Pb(NO) prepared in step 1) 3 ) 2 In the solution for 1min, take it out and dry it with nitrogen;

[0042] 3) Immerse the photoanode material obtained in step 2) into the Na prepared in step 1) 2 In the S solution for 1min, take it out and dry it with nitrogen gas, and then form a PbS semiconductor quantum dot sensitizer layer on the photoanode material;

[0043] 4) Equipped with Cd(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0044] 5) Add InCl 3 The solution is added to step 4) equipped with Cd(NO 3 ) 2 solution, where In 3+ with Cd 2+ The ratio of t...

Embodiment 3

[0049] The specific steps of the indium-doped cadmium sulfide quantum dot sensitizer for solar cells and the preparation method are:

[0050] 1) Equipped with Pb(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0051] 2) The photoanode material TiO to be sensitized 2 Immerse the Pb(NO) prepared in step 1) 3 ) 2 In the solution for 1min, take it out and dry it with nitrogen;

[0052] 3) Immerse the photoanode material obtained in step 2) into the Na prepared in step 1) 2 In the S solution for 1min, take it out and dry it with nitrogen gas, and then form a PbS semiconductor quantum dot sensitizer layer on the photoanode material;

[0053] 4) Equipped with Cd(NO at a concentration of 0.1M 3 ) 2 solution and Na 2 S solution, placed in a water bath at 20-50°C for 30-60min;

[0054] 5) Add InCl 3 The solution is added to step 4) equipped with Cd(NO 3 ) 2 solution, where In 3+ with Cd 2+ The ratio of t...

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Abstract

The invention relates to an In-doped CdS quantum dot sensitizer used for a solar cell and a manufacturing method of the In-doped CdS quantum dot sensitizer. According to the method, In impurity atoms are doped to CdS semiconductor quantum dots to serve as sensitizers, and the In impurity atoms and the CdS semiconductor quantum dots are assembled to form the quantum dot sensitized solar cell. The light absorption capacity of In-doped CdS semiconductors is enhanced, the transmission routes of electron holes inside the cell are optimized, and therefore the electron holes can be more rapidly separated, electrons can be more effectively injected into conduction bands of large energy gap oxide semiconductors, occurrence of dark currents is restrained, and short-circuit currents and photoelectric conversion efficiency of the solar cell are improved. The method is simple, easy to operate, low in cost and suitable for large-area manufacture.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and more specifically relates to a doped quantum dot sensitizer for solar cells and a preparation method thereof. Background technique [0002] Facing the depletion of global fossil energy, the inexhaustible solar energy can replace fossil energy to solve the increasingly serious energy crisis. Among all kinds of new solar cells, dye-sensitized solar cells (DSSCs) have become a research hotspot due to their low cost, simple manufacturing process, and relatively high photoelectric conversion efficiency (O’Regan, B., M., Nature, 1991, 353, 737). DSSCs are formed by using the wide-bandgap semiconductor nanocrystalline film adsorbed with dye as the positive electrode, the conductive glass coated with a layer of platinum on the surface as the counter electrode, and an oxidation-reduction electrolyte is added between the positive electrode and the counter electrode. Dye molecules absorb solar e...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
Inventor 邹小平黄宗波周洪全
Owner BEIJING INFORMATION SCI & TECH UNIV
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