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Urbach’s tails in the absorption spectra of CuInTe[sub 2] single crystals with various deviations from stoichiometry

✍ Scribed by Wasim, S. M.; Marı́n, G.; Rincón, C.; Sánchez Pérez, G.; Mora, A. E.

Book ID: 121810415
Publisher: American Institute of Physics
Year: 1998
Tongue: English
Weight: 322 KB
Volume: 83
Category: Article
ISSN: 0021-8979
DOI: 10.1063/1.367100

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## Abstract Optical absorption spectra of CuIn~5~Se~8~ and CuGa~3~Se~5~ single crystals grown by chemical vapour transport were investigated in the range of 10–300 K. The logarithmic variation of the absorption coefficient with photon energy observed in both compounds just below the fundamental abs