Method for preparing buffer layer material of thin-film solar cell

Abstract

The invention relates to a method for preparing a buffer layer material of a thin-film solar cell. The method comprises the following steps: mixing organic zinc salts with thio-organic matters, after that, generating an ammonium complex of zinc sulfide by an ammonia aeration reaction; transforming the ammonium complex of the zinc sulfide into a crystal structure by adopting a sedimentation method, and crushing the crystal by an ultrasonic treatment; and finally, in a high pressure sealed reaction, using graphene and an auxiliary agent to modify, and then the buffer layer material of the thin-film solar cell is prepared. Compared with the prior art, the method for preparing the buffer layer material of the thin-film solar cell provided by the invention takes the organic zinc salts and the thio-organic matters as raw materials, which thoroughly solves the problem of cadmium metal pollution; the preparation method is simple, and the process condition is moderate; and besides, the prepared buffer layer material has excellent performance, and the efficiency of the solar thin-film batteries is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a preparation method of a thin-film solar cell buffer layer material. Background technique [0002] Solar energy is an inexhaustible and inexhaustible source of energy. Solar cells provide a photoelectric conversion device that generates electricity with minimal environmental impact. more attention. At present, the main directions of solar cell module research are high photoelectric conversion efficiency, low cost, durability, easy installation, light weight, and avoiding other environmental problems. However, thin-film solar cells only need a few Microns can effectively convert solar energy into electrical energy, so it has broad development prospects. [0003] The working principle of thin-film solar cells is as follows: after sunlight is incident on the transparent electrode, it passes through the anti-reflection film, window layer, and buffer layer to the absorbing layer ...

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Problems solved by technology

The efficiency of thin-film solar cells prepared by vacuum evaporation is relatively high, but this method has relatively high requirements for equipment, low raw material utilization rate and difficult to control the evaporation process, poor repeatability, and it is difficult to realize industrialized large-scale production; magnetron sputtering method And molecular beam epitaxy can adjust the ratio of each element more accurately, the prepared buffer layer material has good quality, high uniformity, good repeatability, high conversion efficiency, but there are complex preparation process, high equipment requirements, low production efficiency, production The problem of high cost makes it difficult to implement large-scale production; while the electrodeposition method has simple equipment and can achieve continuous large-area low-temperature multi-component deposition, but because the deposition potential is too negative during electrodeposition, hydrogen evolution reactions are prone to occur, making the deposited film porous Many, uneven, buffer layer material components deviate from the stoichiometric ratio, poor product quality, which seriously hinders the conversion efficiency of thin-film solar cells

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