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Refractive index, static dielectric constant, energy band gap and oscillator parameters of Ga 2 SeS single crystals
Author(s) -
Qasrawi A. F.,
Gasanly N. M.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200723122
Subject(s) - refractive index , transmittance , dielectric , band gap , dispersion (optics) , materials science , optics , reflectivity , oscillator strength , analytical chemistry (journal) , optoelectronics , chemistry , spectral line , physics , chromatography , astronomy
The optical properties of Bridgman method grown Ga 2 SeS crystals have been investigated by means of room‐temperature transmittance and reflectance spectral analysis. The optical data have revealed direct and indirect allowed transition band gaps of 2.49 and 2.10 eV, respectively. The room‐temperature refractive index, which was calculated from the reflectance and transmittance data, allowed the identification of the dispersion and oscillator energies, static dielectric constant and static refractive index as 20.93 eV and 4.01 eV, 6.21 and 2.49, respectively. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)