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Optical Band Edge Absorption in CuInSe 2
Author(s) -
Medvedkin G. A.,
Rud Yu. V.,
Tairov M. A.
Publication year - 1987
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221440241
Subject(s) - chalcopyrite , absorption edge , absorption (acoustics) , enhanced data rates for gsm evolution , linear dichroism , absorption spectroscopy , absorption band , dichroism , chemistry , materials science , crystallography , optics , analytical chemistry (journal) , band gap , circular dichroism , optoelectronics , physics , copper , telecommunications , organic chemistry , computer science , chromatography
Optical properties are studied of (100) oriented CuInSe 2 (D 2d 12 ) crystals near the absorption edge. While the edge absorption spectra in the range 80 to 370 K are found to follow Urbach's rule, there are two regions in α(ħω) differing in the temperature dependence of Urbach's parameter. The results obtained suggest that the optical band edge absorption in CuInSe 2 is dominated by electron–phonon interaction. Linear optical dichroism of the edge absorption in chalcopyrite‐structure CuInSe 2 is revealed and investigated. CuInSe 2 is established to differ from the other chalcopyrite crystals in a negative linear dichroism near the absorption edge.