Solar cell component structure

Abstract

The invention discloses a solar cell component structure comprising a substrate, a metal layer, a p-type semiconductor layer, an n-type semiconductor layer, a transparent conductive layer and a high resistance film layer, wherein the metal layer is formed on the surface of the substrate; the p-type semiconductor layer is formed on the metal layer and comprises copper indium gallium selenium sulfur (CIGSS), copper indium gallium selenium (CIGS), copper indium sulfur (CIS), copper indium selenium (CIS) or a compound material containing two or two more of copper, selenium or sulfur; the n-type semiconductor layer has the photocatalyst characteristics (such as improvement of carrier mobility by using irradiation), is formed on the surface of the p-type semiconductor layer and forms a p-n joint surface together with the p-type semiconductor layer; the transparent conductive layer is formed on the n-type semiconductor layer; and the high resistance film layer is formed between the metal layer and the transparent conductive layer.

Description

Technical field [0001] The present invention relates to a solar cell structure, in particular to a thin-film solar cell structure containing four elements of copper indium gallium selenium (CIGS). Background technique [0002] Among the thin-film solar cells, there are two types of photoelectric cell meters of Copper Indium Gallium Diselenide Solar Cells: one containing three elements of copper indium selenium (CIS) and one containing four elements of copper indium gallium selenium (Referred to as CIGS). Because of its high photoelectric efficiency and low material cost, it is favored by many people. The photoelectric efficiency of CIGS photovoltaic cells completed in the laboratory can reach up to about 19%, and as far as the module is concerned, it can reach up to about 13%. [0003] figure 1 A conventional CIGS solar cell structure 10 is disclosed, which is a laminated structure including a substrate 11, a metal layer 12, a CIGS layer 13, a buffer layer 14 and a transparent co...

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Problems solved by technology

[0004] If the buffer layer contains cadmium sulfide (CdS), because cadmium is toxic, it will cause considerable harm to human health if eaten

Therefore, if there is cadmium in solar cell components, if they are not properly disposed of in the future, it may cause environmental pollution and increase the suspicion of health threats.

[0005] In addition, CdS is generally produced by chemical bath deposition (Chemical Bath Deposition; CBD), so a large amount of waste liquid will be generated during the manufacturing process, which will also have an impact on the environment

[0006] Therefore, the current advanced processes are all developing towards finding alternatives to CdS to solve the problems that may arise from the use of CdS

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