期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 19, 页码 10412-10416出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b01622
关键词
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We have investigated the impact of heat treatment on the chemical structure of the In2S3/CuIn(S,Se)(2) thin-film solar cell interface using X-ray photoelectron and soft X-ray emission spectroscopy. As-grown, we find the formation of a sulfur-poor (indium-rich) In2S3 surface, an abrupt interface, and sulfur atoms in both In2S3 and CuIn(S,Se)(2) chemical environments (as expected for an abrupt interface and a thin over-layer). After a heat treatment at 200 degrees C to simulate subsequent process steps, a strong copper and sodium diffusion into the In2S3 layer is observed. This diffusion extends throughout the layer, indicating the formation of a copper-indium-sulfide phase.
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