Preparation method of ectopic adsorption silver selenide quantum dot sensitized solar cell

Abstract

Disclosed is a preparation method of an ectopic adsorption silver selenide quantum dot sensitized solar cell. The method comprises the following steps: (1) cleaning a transparent FTO conductive glass; (2) preparing a deionized water solution of selenosulfate and a deionized water solution of AgNO3, preparing Ag2Se quantum dots, and dispersing the Ag2Se quantum dots into anhydrous ethanol; (3) preparing a TiO2 conductive film, performing ligand exchange on the surface of the conductive film to obtain a bifunctional molecule modified photo anode, sensitizing the Ag2Se quantum dots, and forming a quantum dot sensitized photo anode; (4) dripping an electrolyte to the middle part of the quantum dot sensitized photo anode, and diffusing the electrolyte to the working part of the whole electrode; and (5) covering a counter electrode with the electrode, and fixing the photo anode with the counter electrode together to obtain the quantum dot solar cell. By adopting the nontoxic Ag2Se quantum dots, the coverage of the quantum dots is improved in a ligand exchange manner, and the photoelectric efficiency of a device is improved.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to an ectopic adsorption of silver selenide (Ag selenide) 2 Se) Preparation method of quantum dot-sensitized solar cells. Background technique [0002] With the increasing depletion of mineral energy, the utilization of clean and renewable energy has become the focus of research and the lifeblood of national economic development. As a representative of the third generation of solar cells, quantum dot solar cells have the characteristics of low cost, simple manufacturing process, and potential high efficiency. Quantum dot solar cells (QDSSC) are mainly composed of three parts, the photoanode, the electrolyte and the counter electrode. The photoanode is the core part of the battery. 2 ) is covered on a transparent conductive glass, and then a layer of quantum dots is deposited on the surface. From the perspective of deposition methods, the current deposition methods of quantum dots can b...

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Problems solved by technology

However, the cost of this method is high, and the synthesis process is complicated. If a hydrothermal method is required to prepare TiO 2 Nano stave

[0005] CN 102364648 A discloses a quantum dot-TiO bonded with mercapto bridge molecules 2 Preparation method of nanocomposite photoanode, using hydrothermal method to synthesize quantum dots bonded by mercapto bridging molecules-TiO 2 Composite photoanode, but the preparation process of quantum dots in this method is more complicated, and requires high temperature and high pressure reaction conditions, which is not conducive to popularization and application

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