Crystallographic and optical properties of wide bandgap photovoltaic semiconductor system, Cu(Al,In)Se<sub> 2 </sub>
نویسندگان
چکیده
Abstract We characterized the optical and electronic properties of chalcopyrite-type Cu(Al,In)Se 2 , which is a candidate for wide-bandgap solar cell materials. The bandgap energy was determined from diffuse reflectance spectra. increased 1.00 eV CuInSe to 2.61 CuAlSe with an increase in Al content. ionization corresponding levels valence band maximum (VBM) using photoemission yield spectroscopy. VBM level system stayed relatively constant, but conduction minimum increasing To analyze local structures Cu In atoms K-edge X-ray absorption fine structure (XAFS) spectra were measured at SPring-8. discuss crystallographic characteristics based on results XAFS analyses comparison phase diagrams Se–Al Se 3 Se–In 3, Se–Ga systems.
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ژورنال
عنوان ژورنال: Japanese Journal of Applied Physics
سال: 2022
ISSN: ['0021-4922', '1347-4065']
DOI: https://doi.org/10.35848/1347-4065/ac48cf