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The optical properties of Sb 2 Se 3 Sb 2 Te 3
Author(s) -
Procarione W.,
Wood C.
Publication year - 1970
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.19700420245
Subject(s) - isostructural , orthorhombic crystal system , band gap , hexagonal crystal system , materials science , solid solution , antimony , crystallography , range (aeronautics) , chemistry , crystal structure , analytical chemistry (journal) , optoelectronics , inorganic chemistry , metallurgy , composite material , chromatography
The optical properties of single crystal specimens of Sb 2 Te 3 Sb 2 Se 3 solid solutions have been investigated in the photon energy range 0.04 eV to 6.5 eV. A wide range of solid solutions having hexagonal structure were found to exhibit properties closely corresponding to the isostructural compounds Bi 2 Te 3 and Bi 2 Se 3 . Small indirect band gaps approaching semimetallic values were obtained. The high free‐carrier concentrations gave rise to plasma effects in the near infra‐red. In contrast Sb 2 Se 3 is orthorhombic with a direct band gap near 1 eV. The chemical bonding concepts applied to similar systems seem applicable with only slight modification.