ag 2 Preparation method of se quantum dots-dye co-sensitized solar cells

Abstract

The invention discloses a method for manufacturing a Ag2Se quantum dot-dye co-sensitization solar energy cell. According to the method, mercaptopropionic acid is taken as a surface stabilizing agent, polyvinylpyrrolidone or triammonium citrate is taken as a dispersant, a silver source and a selenium source are utilized to synthesize Ag2Se quantum dot in aqueous phase through a co-deposition method, and the synthesized Ag2Se quantum dot is dispersed in absolute ethyl alcohol to acquire a Ag2Se quantum dot absolute ethyl alcohol solution; a photo anode is sequentially dipped into the Ag2Se quantum dot absolute ethyl alcohol solution and a dye solution for sensitization to acquire a quantum dot-dye co-sensitization photo anode; an electrolyte layer and a counter electrode are prepared on the quantum dot-dye co-sensitization photo anode, and the Ag2Se quantum dot-dye co-sensitization solar energy cell is acquired. The method is advantaged in that the Ag2Se quantum dot is introduced into a dye sensitization cell, wider absorption spectrum is realized, through application to photoelectric devices, the photoelectric devices are made to keep relatively high photoelectric performance and photoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells, in particular to an Ag 2 Preparation method of Se quantum dot-dye co-sensitized solar cell. Background technique [0002] Since 1991 the Ecole Polytechnique de Lausanne Since the professor invented the dye-sensitized solar cell (DSSC) and made a breakthrough, the dye-sensitized solar cell has been widely concerned and valued for its cheap production cost, easy industrial production technology and broad application prospects. The main components of dye-sensitized solar cells include: sensitized photoanode (nano-semiconductor porous film), electrolyte (including redox pairs), and counter electrode; among them, the photoanode part completes the absorption and conversion of sunlight and the collection of photogenerated electrons , has a decisive effect on the photoelectric efficiency of the battery. [0003] Traditional dye-sensitized solar cells have little utilization rate of sunlight,...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN 102157270 A discloses a quantum dot dye-sensitized solar cell, which covers quantum dots and dyes on nitrogen-doped TiO by coating 2 electrode to improve the absorption of incident light. Although the photoelectric efficiency is improved to a certain extent, the particle size of quantum dots is limited between 0 and 50nm, and the distribution range is wide. At the same time, it sensitizes quantum dots and dyes to light. At the anode, dyes and quantum dots may form competitive adsorption, affecting the sensitization effect of quantum dots and dyes

Chinese patent CN103247444 A discloses a dye-sensitized solar cell, which sensitizes dyes and quantum dots to the photoanode and photocathode respectively to realize the absorption of infrared light and visible light at the two electrodes, but because the photocathode composed only of quantum dots There are defects in the conductivity, which limits the improvement of the photoelectric efficiency of the device

Chinese patent CN105428070A discloses a flower-like TiO 2 The preparation method of the dye-sensitized solar cell photoanode of powder and green fluorescent C quantum dots improves the lifespan of photogenerated electrons, but the pollen-like TiO2 required by the method 2 It needs to be prepared by solvent hydrothermal method, the process is complicated, and the fluorescent C point is sensitized on the photoanode by the drop method, which is easy to agglomerate

However, this invention mainly uses chemical deposition or continuous ion layer method to prepare quantum dots, the particle size of quantum dots is uncontrollable, and the preparation process is unstable

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