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A method for preparing ag:zninse quantum dot sensitized solar cells

A technology for sensitizing solar cells and quantum dots, which is applied in the field of quantum dot sensitization solar cells, can solve the problems of late presentation and inability to obtain adsorption effects, and achieve the effects of convenient supply of raw materials, easy promotion and easy operation.

Active Publication Date: 2017-03-15
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the Ag:ZnInSe aqueous phase quantum dots were proposed late, and the traditional methods of preparing battery anodes, such as continuous ion layer adsorption, hydrothermal method, static adsorption, etc., could not obtain better adsorption effects, so far there is no future Application of Ag:ZnInSe quantum dots in quantum dot-sensitized solar cells

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  • A method for preparing ag:zninse quantum dot sensitized solar cells

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preparation example Construction

[0026] The above-mentioned sodium selenium hydride solution is prepared and used now, and the preparation method includes the following steps: dissolving sodium borohydride in deionized water, and then quickly adding selenium powder; sealing the reaction vessel with a rubber stopper, which has a small pinhole and The outside is communicated so as to release the hydrogen generated by the reaction; during the reaction, the system is cooled with an ice-water bath, after which the black selenium powder disappears and white sodium borate crystals are produced, and the clear solution in the upper layer is sodium selenium hydride solution. Its reaction equation:

[0027] 4NaBH 4 +2Se+7H 2 O→2NaHSe+Na 2 B 4 o 7 +14H 2 ↑

Embodiment 1

[0030] 1. Add 0.1M Zn(NO 3 ) 2 , AgNO 3 , In(NO 3 ) 3solution and 355uL mercaptopropionic acid ligand, adding NaOH to adjust the pH to 8.0, adding NaHSe solution under nitrogen to prepare a precursor solution. The prepared precursor solution was refluxed at 100° C. for 6 h to prepare an Ag:ZnInSe quantum dot solution. Zn in the precursor solution 2+ 、In 3+ 、Ag + 、Se 2- , The molar ratio of ligands containing mercapto groups is 3:1:0.12:0.8:8, Zn 2+ and In 3+ The overall concentration is 0.01mol / L.

[0031] 2. Clean the FTO glass with deionized water, isopropanol, and acetone in sequence, and dry it. Use screen printing to adsorb titanium dioxide nanoparticles with a thickness of 12 μm and a diameter of 20 nm on the FTO glass, and then adsorb titanium dioxide nanoparticles with a thickness of 6 μm and a diameter of 400 nm. Titanium dioxide particles were obtained to obtain titanium dioxide film sheets. Finally, the titanium dioxide thin film was sintered at 450° C. ...

Embodiment 2

[0037] 1. Add 0.1M Zn(NO 3 ) 2 , AgNO 3 , In(NO 3 ) 3 solution and 290 uL of mercaptopropionic acid ligand, adding NaOH to adjust the pH to 8.0, and adding NaHSe solution under nitrogen to prepare a precursor solution. The prepared precursor solution was refluxed at 90° C. for 4 hours to prepare an Ag:ZnInSe quantum dot solution. Zn in the precursor solution 2+ 、In 3+ 、Ag + 、Se 2- , The molar ratio of ligands containing mercapto groups is 2.8:0.8:0.1:0.8:6, Zn 2+ and In 3+ The overall concentration is 0.01mol / L.

[0038] 2. Clean the FTO glass with deionized water, isopropanol, and acetone in turn, and dry it. Use screen printing to adsorb titanium dioxide nanoparticles with a thickness of 10 μm and a diameter of 20 nm on the FTO glass, and then adsorb titanium dioxide nanoparticles with a thickness of 8 μm and a diameter of 200 nm. Titanium dioxide particles were obtained to obtain titanium dioxide film sheets. Finally, the titanium dioxide thin film was sintered ...

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Abstract

The invention discloses a method for manufacturing an Ag:ZnInSe quantum dot sensitized solar cell. The method comprises the steps that a manufactured titanium dioxide film is dipped into a concentrated Ag:ZnInSe quantum dot suspension in a direct adsorption type deposition mode, and Ag:ZnInSe quantum dots are deposited on titanium dioxide; a certain amount of surface active agent Triton x-100 is added to the concentrated suspension so that the number of deposited quantum dots can be increased. By the adoption of the method, a fresh novel non-toxic quantum dot sensitized solar cell is manufactured; the adsorption of the quantum dots is enhanced through Triton x-100; needed devices are simple, operation is easy, raw materials can be conveniently supplied, the cost of the raw materials is low, and the method can be completed in an ordinary chemical laboratory and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of quantum dot-sensitized solar cells, in particular to a method for preparing Ag:ZnInSe quantum-dot-sensitized solar cells. Background technique [0002] Compared with traditional solar cells, quantum dot-sensitized solar cells have the advantages of good stability, low cost, and adjustable bandgap width, and have attracted great attention in recent years. The anode of quantum dot sensitized solar cells is composed of titanium dioxide nanoparticles adsorbed with quantum dot sensitization materials. Currently, commonly used quantum dot sensitization materials mainly include cadmium compounds (CdTe, CdSe, CdSe) and lead compounds (PbS, PbSe )Wait. Although these materials can obtain high conversion efficiency (greater than 6%), the introduction of cadmium and lead elements will cause biological toxicity and environmental pollution, which severely limits the application prospects of this type of quantum dots....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20
Inventor 徐淑宏王赵冲王春雷崔一平
Owner SOUTHEAST UNIV