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Method for increasing performance parameter of quantum dot sensitized solar battery

A solar cell and quantum dot sensitization technology, which is applied in the field of solar cells to achieve the effect of increasing the conduction band, suppressing the generation of dark current, and improving the adsorption status

Inactive Publication Date: 2012-05-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

to TiO 2 Doping electrode materials is also a commonly used and effective method, but the work of improving the photoelectric conversion efficiency of QDSSC by doping quantum dots has not been reported yet.

Method used

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  • Method for increasing performance parameter of quantum dot sensitized solar battery
  • Method for increasing performance parameter of quantum dot sensitized solar battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific steps of a method for improving performance parameters of quantum dot-sensitized solar cells are:

[0024] 1) Grind 0.2g of P25 titanium dioxide and a binder to make a slurry, print it on conductive glass by screen printing, and bake it at 500°C for 4h to obtain the electrode material to be sensitized, and the film of the electrode material The thickness is 5 μm;

[0025] 2) Alternately immerse the electrode material to be sensitized in 0.1M Cd(NO 3 ) 2 ethanol solution to neutralize 0.1M Na 2 In the aqueous solution of S, where Cd(NO 3 ) 2 The ethanol solution contained 0.2% Ca(NO 3 ) 2 , to be Ca 2+ When the mass molar concentration on the electrode material is between 1%, it becomes a sensitized electrode material;

[0026] 3) Assemble the sensitized electrode material, the Pt counter electrode and the injected liquid electrolyte solution to form the quantum dot sensitized solar cell with a sandwich structure.

[0027] The binder in step 1) is a...

Embodiment 2

[0029] The specific steps of a method for improving performance parameters of quantum dot-sensitized solar cells are:

[0030] 1) Grind 2g of P25 titanium dioxide and a binder to make a slurry, print it on conductive glass by screen printing, and bake it at 550°C for 1h to obtain the electrode material to be sensitized. The film thickness of the electrode material is 15 μm;

[0031] 2) Alternately immerse the electrode material to be sensitized in 1M Cd(NO 3 ) 2 Ethanol solution neutralizes 1M Na 2 In the aqueous solution of S, where Cd(NO 3 ) 2 The ethanol solution contained 8% Ca(NO 3 ) 2 , to be Ca 2+ When the mass molar concentration on the electrode material is between 5%, it becomes a sensitized electrode material;

[0032] 3) Assemble the sensitized electrode material, the Pt counter electrode and the injected liquid electrolyte solution to form the quantum dot sensitized solar cell with a sandwich structure.

[0033] The binder in step 1) is an ethanol solutio...

Embodiment 3

[0035] The specific steps of a method for improving performance parameters of quantum dot-sensitized solar cells are:

[0036] 1) Grind 1g of P25 titanium dioxide and a binder to make a slurry, print it on conductive glass by screen printing, and bake it at 520°C for 3h to obtain the electrode material to be sensitized. The film thickness of the electrode material is 10μm;

[0037] 2) Alternately immerse the electrode material to be sensitized in 0.5M Cd(NO 3 ) 2 ethanol solution to neutralize 0.5M Na 2 In the aqueous solution of S, where Cd(NO 3 ) 2 The ethanol solution contained 5% Ca(NO 3 ) 2 , to be Ca 2+ When the mass molar concentration on the electrode material is between 3%, it becomes a sensitized electrode material;

[0038] 3) Assemble the sensitized electrode material, the Pt counter electrode and the injected liquid electrolyte solution to form the quantum dot sensitized solar cell with a sandwich structure.

[0039] The binder in step 1) is an ethanol so...

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Abstract

The invention relates to a method for increasing performance parameters of a quantum dot sensitized solar battery. In the method, Ca<2+> is doped into CdS and serves as a sensitizing agent to assemble the quantum dot sensitized solar battery; the conduction band of Cds is enhanced, so electronic energy can be injected into TiO2 more effectively; meanwhile, the absorption state of the Cds quantum dot on the surface of an electrode material is improved, the dark current is restrained, and short circuit current and photoelectric conversion efficiency of the solar battery are improved. The processing method is simple, easy to operate, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and more specifically relates to a method for improving performance parameters of quantum dot-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells (DSSCs) are a clean energy source that utilizes dyes to absorb sunlight to convert sunlight into electrical energy. After the dye is excited by sunlight, electrons are injected into the conduction band of the semiconductor; the electrons diffuse in the semiconductor to the conductive substrate, and then flow into the external circuit; the dye molecules in the oxidized state are reduced and regenerated by the electrolyte in the reduced state; Electrodes are reduced after accepting electrons, thus completing the DSSC cycle work. Swiss scientist Michael Grötzel's research team took the lead in making a breakthrough in DSSC in 1991. At present, the photoelectric conversion efficiency of DSSC has reached 11%, which is comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00
Inventor 魏明灯李亚峰
Owner FUZHOU UNIV
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