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Photoluminescence and optical absorption spectra of γ 1 ‐(Ga x In 1– x ) 2 Se 3 mixed crystals
Author(s) -
Kranjčec M.,
Studenyak I. P.,
Azhniuk Yu. M.
Publication year - 2005
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.200540073
Subject(s) - photoluminescence , absorption edge , exciton , absorption spectroscopy , absorption (acoustics) , spectral line , materials science , impurity , crystal (programming language) , analytical chemistry (journal) , band gap , chemistry , molecular physics , condensed matter physics , optics , physics , optoelectronics , organic chemistry , chromatography , astronomy , computer science , composite material , programming language
Temperature and compositional studies of photoluminescence and optical absorption edge spectra of γ 1 ‐(Ga x In 1– x ) 2 Se 3 mixed crystals with x = 0.1–0.4 are performed. Exciton and impurity‐related photoluminescence bands are revealed at low temperatures and Urbach shape of the absorption edge is observed in the temperature range 77–300 K. Temperature and compositional dependences of the photoluminescence band spectral positions and halfwidths as well as optical pseudogap and absorption edge energy width are investigated. Mechanisms of radiative recombination and optical absorption as well as crystal lattice disordering processes in γ 1 ‐(Ga x In 1– x ) 2 Se 3 solid solutions are studied. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)