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Method for preparing sensitized ZnO nano-plate photo-anode of PbS quantum dot

A quantum dot sensitization and nanosheet technology, which is applied in the direction of photosensitive equipment, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of uneven distribution of quantum dots, complex preparation process, limited use of light energy, etc. The method is simple, the deposition is uniform, and the effect of improving the photoelectric conversion efficiency

Inactive Publication Date: 2011-04-20
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of these methods is very complicated, and the uneven distribution of quantum dots is prone to defect recombination to reduce efficiency. At the same time, ZnO mostly adopts nanorod structure, which has limited utilization of light energy.

Method used

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  • Method for preparing sensitized ZnO nano-plate photo-anode of PbS quantum dot
  • Method for preparing sensitized ZnO nano-plate photo-anode of PbS quantum dot
  • Method for preparing sensitized ZnO nano-plate photo-anode of PbS quantum dot

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specific Embodiment approach

[0026] A kind of specific embodiment of the present invention is: a kind of preparation method of PbS quantum dot sensitized ZnO nano sheet photoanode, and its concrete method is:

[0027] The fluorine-doped SnO2 conductive glass is washed with detergent, dilute hydrochloric acid, acetone, and deionized water in sequence before being deposited, dried and then subjected to the following operations.

[0028] a. Preparation of ZnO nanosheets by electrodeposition

[0029] With platinum as auxiliary electrode, saturated calomel electrode as reference electrode, fluorine-doped SnO 2 The conductive glass is the working electrode, and the electrolyte is Zn(NO 3 ) 2 and KCl mixture, where Zn(NO 3 ) 2 The concentration of KCl is 0.05M, and the concentration of KCl is 0.06M; the electrolytic cell is placed in a constant temperature tank at 70°C, the constant voltage is -1.1V, and the electrodeposition is carried out for 1.5 hours under stirring conditions. The sediment is taken out, ...

Embodiment 2

[0038] The approach in this example is:

[0039] a. Preparation of ZnO nanosheets by electrodeposition

[0040] With platinum as auxiliary electrode, saturated calomel electrode as reference electrode, fluorine-doped SnO 2 The conductive glass is the working electrode, and the electrolyte is Zn(NO 3 ) 2 and KCl mixture, where Zn(NO 3 ) 2 The concentration of KCl is 0.04M, and the concentration of KCl is 0.07M; the electrolytic cell is placed in a constant temperature tank at 60°C, the constant voltage is -1.0V, and the electrodeposition is carried out for 1.8 hours under stirring conditions. The sediment is taken out, rinsed with deionized water, and dried Dry, normalize at 400°C for 50 minutes to obtain ZnO nanosheets;

[0041] b. Preparation of ZnO / PbS composite film in successive chemical baths

[0042] Soak the ZnO nanosheets prepared in step a in 0.15M Pb(NO 3 ) 2 solution, deionized water, 0.15M Na 2 S solution and deionized water each for 40s, 20s, 10s, 40s are...

Embodiment 3

[0044] The approach in this example is:

[0045] a. Preparation of ZnO nanosheets by electrodeposition

[0046] With platinum as auxiliary electrode, saturated calomel electrode as reference electrode, fluorine-doped SnO 2 The conductive glass is the working electrode, and the electrolyte is Zn(NO 3 ) 2 and KCl mixture, where Zn(NO 3 ) 2 The concentration of KCl is 0.06M, and the concentration of KCl is 0.06M; the electrolytic cell is placed in a constant temperature tank at 80°C, the constant voltage is -1.2V, and the electrodeposition is carried out for 2 hours under stirring conditions, and the sediment is taken out, rinsed with deionized water, dried Dry, normalize at 430°C for 40 minutes to obtain ZnO nanosheets;

[0047] b. Preparation of ZnO / PbS composite film in successive chemical baths

[0048] Soak the ZnO nanosheets prepared in step a in 0.12M Pb(NO 3 ) 2 solution, deionized water, 0.12M Na 2 S solution and deionized water each for 40s, 20s, 10s, and 40s a...

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Abstract

The invention discloses a method for preparing a sensitized ZnO nano-plate photo-anode of a PbS quantum dot, comprising the following steps: preparing ZnO nano-plates on fluorine-doped SnO2 conducting glass by using an electro-deposition method; soaking the prepared ZnO nano-plates in 0.1-0.15M of Pb (NO3)2 solution, deionized water, 0.1-0.15M of Na2S solution and the deionized water in sequence for 40s, 20s, 10s and 40s respectively to finish one cycle; and washing for 3 times by the deionized water after circulating and soaking for 8-15 times, and drying to obtain the ZnO nano-plate photo-anode. The method for preparing a sensitized ZnO nano-plate photo-anode of a PbS quantum dot has the advantages of simple equipment, fewer synthesized steps and low energy consumption, is,simple in operation, and is suitable for large-scale production; and meanwhile, the sensitized ZnO nano-plate photo-anode of the PbS quantum dot prepared by the method has large adsorption space, can be further sensitized by utilizing other semiconductor quantum dots, and has good photoelectric properties.

Description

technical field [0001] The invention relates to a preparation method of a PbS quantum dot sensitized ZnO nanosheet photoanode. Background technique [0002] Solar energy is an inexhaustible green and environmentally friendly energy source, and the development and utilization of solar energy has attracted more and more attention from various countries. In the 1990s, the Ecole Polytechnique de Lausanne, Switzerland Dye-sensitized nanocrystalline TiO 2 Solar cells (DSSCs) have the advantages of high conversion efficiency, low cost, and simple fabrication process, and have become a research hotspot in recent years. Nanostructured ZnO has the advantages of wide bandgap, easy preparation under mild conditions, and special photoelectric properties, etc. It is often used as a photoanode for DSSCs for related research. The stability of photosensitizer and light absorption play an important role in DSSCs. At present, despite the success of DSSCs using ruthenium dyes, it is still ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L31/18
CPCY02P70/50
Inventor 杨峰廖鑫赵勇
Owner SOUTHWEST JIAOTONG UNIV
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