Device and method for efficient roll-to-roll preparation of cadmium sulfide thin film

Abstract

The invention relates to a device for efficient roll-to-roll preparation of a cadmium sulfide thin film. The device comprises a conveying mechanism for flatly conveying a flexible substrate, a deposition box for carrying out a deposition reaction, a solution heating circulating mechanism connected with the deposition box, a cylinder washing / brushing mechanism for washing and brushing the substrate, and a drying device for drying the substrate, wherein the deposition box, the cylinder washing / brushing mechanism and the drying device are orderly arranged in the conveying direction of the substrate. The invention also relates to a method for the efficient roll-to-roll preparation of the cadmium sulfide thin film. The method comprises the steps of unfolding the substrate, preparing a solution, heating the solution, reacting for deposition, conveying the substrate, cleaning the substrate, conveying the clean substrate, drying the surface and reeling the substrate. The device and the method have the advantages of simple structure, and achievable continuous large-batch production, and belong to the technical field of the thin-film solar cell manufacturing process.

Description

technical field [0001] The invention relates to a thin film solar cell manufacturing process, in particular to a roll-to-roll preparation device and method for preparing a cadmium sulfide buffer layer film of a flexible copper indium gallium selenium thin film solar cell. Background technique [0002] Copper indium gallium selenide (CIGS) thin-film solar cells are regarded as one of the most promising types of thin-film solar cells in the future because of their high conversion efficiency and low material manufacturing costs. CIGS thin film solar cell is a thin film cell with layered structure, generally composed of substrate, back electrode, CIGS absorber layer, buffer layer, transparent conductive oxide layer and front metal electrode, among which the function of buffer layer is to communicate with P A type of CIGS absorber forms a P-N junction to separate photogenerated carriers. At present, there are materials such as CdS, ZnS, and Zn(O, S, OH) for the buffer layer, but...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of discontinuous production, incoherent steps and low efficiency in the preparation of cadmium sulfide buffer layer films in the prior art, the purpose of the present invention is to provide a high-quality, high-efficiency, continuous, low-cost, industrialized Apparatus and method for efficiently preparing cadmium sulfide thin film by mode roll-to-roll

Images