Preparation method of flexible copper-indium-gallium-selenide thin-film solar cell monolithic integrated assembly

Abstract

The invention discloses a preparation method of a flexible copper-indium-gallium-selenide thin-film solar cell monolithic integrated assembly. A flexible copper-indium-gallium-selenide thin-film solar cell comprises a substrate, a back electrode layer, an absorption layer, a buffer layer, a high-resistance layer and a transparent conductive layer sequentially from bottom to top. The preparation method comprises the following steps: S1, etching at least one group of channels on a flexible copper-indium-gallium-selenide thin-film solar cell by use of a laser etching method, wherein each group of channels includes a first channel, a second channel and a third channel, the bottom side of the first channel is the upper surface of a substrate, the second channel is disposed between the first channel and the third channel, the bottom side of the second channel is the upper surface of a back electrode layer, and the bottom side of the third channel is disposed between the upper surface of a high-resistance layer and the upper surface of the back electrode layer; S2, pouring an insulating material into the first channels and curing the insulating material; S3, filling the second channels with an electrode material and curing the electrode material; and S4, leading out positive and negative electrodes from a monolithic integrated assembly, and then performing packaging.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for preparing a flexible copper indium gallium selenium thin film solar cell monolithic integrated assembly. Background technique [0002] In various thin film solar cell systems, copper indium gallium selenide Cu(In,Ga)Se 2 (referred to as CIGS) thin-film solar cells have the characteristics of high photoelectric conversion efficiency, good stability, and strong radiation resistance. Flexible substrate CIGS thin-film solar cells are light, rollable, flexible in unfolding methods, and have high mass specific power. Broad application prospects. [0003] The traditional manufacturing process of glass substrate copper indium gallium selenium thin film solar cell monolithic integrated module is to carry out the first scribing after the back electrode is deposited, then deposit the absorption layer, buffer layer and high resistance layer, and then carry out the second sc...

AI Technical Summary

Problems solved by technology

However, two process steps of filling insulating glue and coating silver paste (step 2 and step 4) are interspersed in the preparation method of the whole monomer integrated component, which makes it difficult to make the second and third scribing (step 3 and step 5) Precise positioning increases the dead area of ​​the module, reduces the light-receiving area, and has the risk of low yield. It is especially not suitable for the roll-to-roll production process, and the production process is cumbersome and time-consuming, which reduces the efficiency of component production.

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