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Excitonic absorption and Urbach's tail in bismuth sulfide single crystals

โœ Scribed by A. Cantarero; J. Martinez-Pastor; A. Segura; A. Chevy


Book ID
110557819
Publisher
Springer
Year
1988
Tongue
English
Weight
611 KB
Volume
45
Category
Article
ISSN
1432-0630

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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 10โ€“300 K. The logarithmic variation of the absorption coefficient with photon energy observed in both compounds just below the fundamental abs