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Method of preparing La-doped CdS/CdSe sensitizer for solar cell

A technology of solar cells and sensitizers, applied in the field of solar energy, to achieve the effects of improving photoelectric conversion efficiency, increasing short-circuit current density, and reducing dark current

Inactive Publication Date: 2015-07-15
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 improving the performance parameters of solar cells by doping CdS quantum dots with rare earth element La as a sensitizer through the SILAR method has not been reported.

Method used

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  • Method of preparing La-doped CdS/CdSe sensitizer for solar cell
  • Method of preparing La-doped CdS/CdSe sensitizer for solar cell
  • Method of preparing La-doped CdS/CdSe sensitizer for solar cell

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Experimental program
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Effect test

Embodiment 1

[0027] The specific steps of the preparation method of lanthanum-doped cadmium sulfide / cadmium selenide quantum dot sensitizer are:

[0028] 1) 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;

[0029] 2) LaCl 3 Add the Cd(NO 3 ) 2 solution, where La3+ with Cd 2+ The molar concentration ratio is 1:1;

[0030] 3) Put the solution obtained in step 2) into a water bath at 30°C for 30 minutes;

[0031] 4) The photoanode material TiO to be sensitized 2 Immerse in the solution prepared in step 3) for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0032] 5) Immerse the photoanode material obtained in step 4) into the Na prepared in step 1) 2 In the S solution for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0033] 6) Immerse the photoanode material obtained in step 5) into the Cd(NO 3 ) 2 In the so...

Embodiment 2

[0036] The specific steps of the preparation method of lanthanum-doped cadmium sulfide / cadmium selenide quantum dot sensitizer are:

[0037] 1) 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;

[0038] 2) LaCl 3 Add the Cd(NO 3 ) 2 solution, where La 3+ with Cd 2+ The molar concentration ratio is 1:500;

[0039] 3) Put the solution obtained in step 2) into a water bath at 30°C for 30 minutes;

[0040] 4) The photoanode material TiO to be sensitized 2 Immerse in the solution prepared in step 3) for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0041] 5) Immerse the photoanode material obtained in step 4) into the Na prepared in step 1) 2 In the S solution for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0042] 6) Immerse the photoanode material obtained in step 5) into the Cd(NO 3 ) 2 In th...

Embodiment 3

[0045] The specific steps of the preparation method of lanthanum-doped cadmium sulfide / cadmium selenide quantum dot sensitizer are:

[0046] 1) 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;

[0047] 2) LaCl 3 Add the Cd(NO 3 ) 2 solution, where La 3+ with Cd 2+ The molar concentration ratio is 1:1000;

[0048] 3) Put the solution obtained in step 2) into a water bath at 30°C for 30 minutes;

[0049] 4) The photoanode material TiO to be sensitized 2 Immerse in the solution prepared in step 3) for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0050] 5) Immerse the photoanode material obtained in step 4) into the Na prepared in step 1) 2 In the S solution for 5 minutes, take it out, clean it with the corresponding solvent, and dry it with nitrogen;

[0051] 6) Immerse the photoanode material obtained in step 5) into the Cd(NO 3 ) 2 In t...

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Abstract

The invention relates to a method of preparing La-doped CdS / CdSe sensitizer for a solar cell. According to the method, La impurity atoms are doped in CdS semiconductor quantum dots, co-sensitization with CdSe quantum dots is then carried out to serve as a sensitizer to be assembled to a quantum dot sensitization solar cell. Through optimizing a transmission path of charges inside the cell, electron holes can be separated more quickly, electrons can be injected to a TiO2 conduction band more efficiently, dark current is reduced, and the short circuit current, the open circuit voltage and the photoelectric conversion efficiency of the solar cell are improved. The method is simple, operation is easy, the cost is low, and large-area preparation can be realized.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and more specifically relates to a method for preparing a lanthanum-doped cadmium sulfide / cadmium selenide sensitizer for solar cells. Background technique [0002] With the rapid development of the global economy, the continuous growth of population and the gradual deepening of human dependence on energy, energy crisis and environmental pollution have become the primary problems facing human beings in the 21st century. Facing the depletion of global petrochemical energy, inexhaustible solar energy is undoubtedly the first choice for human future energy development. Therefore, using solar energy as a source of new energy supply has attracted the most attention, and it has received close attention from all walks of life in terms of technological development process and future prospects. A device that directly converts light energy into electrical energy through the photoelectric effect is a ...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20
Inventor 邹小平何胜滕功清赵川
Owner BEIJING INFORMATION SCI & TECH UNIV
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