Flexible copper indium gallium selenium thin film solar cell module and preparation method thereof

Abstract

The invention provides a flexible copper indium gallium selenium thin film solar cell module which is composed of a flexible substrate, a double-layer Mo metal back electrode, a copper indium gallium selenium thin film absorbing layer, a CdS buffering layer, an intrinsic ZnO thin film barrier layer and a transparent conductive aluminum-doped ZnO thin film window layer, wherein the flexible substrate, the double-layer Mo metal back electrode, the copper indium gallium selenium thin film absorbing layer, the CdS buffering layer, the intrinsic ZnO thin film barrier layer and the transparent conductive aluminum-doped ZnO thin film window layer sequentially form a laminated structure. In the preparation process of the solar cell module, three carving grooves are respectively formed in the different layer faces in a marking mode. The flexible copper indium gallium selenium thin film solar cell module has the advantages of being suitable for the reel-to-reel process to prepare the flexible copper indium gallium selenium thin film solar cell module of a large area in a large-scale mode, meeting the requirements for voltage and currents of a photovoltaic module in the practical application, and achieving internal series connection of a flexible copper indium gallium selenium thin film solar cell. Moreover, the module is free from the short circuit and large in effective area, improves production efficiency and lowers production cost.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a flexible copper indium gallium selenium thin film solar cell component and a preparation method thereof. Background technique [0002] Copper indium gallium selenide thin-film solar cells have the advantages of high conversion efficiency, strong radiation resistance, and no attenuation. They are research and investment hotspots in the international photovoltaic industry and are one of the most promising thin-film solar cells. CIGS thin-film solar cells belong to the second generation of photovoltaic cells. Polycrystalline CIGS materials are used as the absorbing layer of the cells. Since the 1970s, rapid development has been achieved. At present, the highest laboratory efficiency of CIGS thin-film solar cells has reached 20.4%, which is comparable to that of polycrystalline silicon. The conversion efficiency of the battery is close to that of all thin film batteries. Flexi...

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Problems solved by technology

Glass substrate CIGS thin-film battery components use laser scribing to cut the back electrode from the back to form the basis of thin-film battery components, but polyimide or flexible metal materials are opaque, and it is difficult for the laser to pass through the flexible substrate, so the back electrode cannot be used to cut the back electrode However, the method of scribing the back electrode by mechanical scribing on the front side will cause the mechanical knife head to sink into the flexible substrate, and at the same time, a large number of debris will remain in the groove, resulting in a short circuit of the sub-battery of the component.

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