期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 74, 期 5, 页码 659-664出版社
SPRINGER
DOI: 10.1007/s003390100931
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We report pseudodielectric functions of the quaternary semiconductor alloys CuGaxIn1-xSe2. Measurements were done in polycrystalline samples from 0.7 to 5.2 eV at room temperature by spectral ellipsometry. Accurate values of refractive indices n and extinction coefficients k representative of the bulk materials are obtained from the data. The structures observed in are analyzed by fitting the numerically differentiated spectra of d(2) (omega)/domega(2) to analytic line shapes. The obtained energies are related to given inter-band transitions by taking into account the electronic band structures of the ternary end-point compounds.
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