Influence of compositional disorder on optical absorption processes in Cu6P(S1-xSex)(5)I crystals

Authors
Studenyak, IP Kranjcec, M Kovacs, GS Desnica-Frankovic, ID Panko, VV Slivka, VY
Citation
Ip. Studenyak et al., Influence of compositional disorder on optical absorption processes in Cu6P(S1-xSex)(5)I crystals, J MATER RES, 16(6), 2001, pp. 1600-1608
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS RESEARCH
ISSN journal
08842914 → ACNP
Volume
16
Issue
6
Year of publication
2001
Pages
1600 - 1608
Database
ISI
SICI code
0884-2914(200106)16:6<1600:IOCDOO>2.0.ZU;2-M
Abstract
The fundamental absorption edge of Cu6P(S0.6Se0.4)(5)I and Cu6P(S0.4Se0.6)( 5)I crystals was studied in the 77-320 K temperature range where no phase t ransitions were revealed by optical techniques. The temperature behavior of the exponential Urbach absorption edge in Cu6P(S0.6Se0.4)(5)I and Cu6P(S0. 4Se0.6)(5)I crystals was analyzed. The effect of compositional disorder upo n the Urbach edge parameters, parameters of exciton-phonon interaction, and lattice parameters in Cu6P(S1-xSex)(5)I, 0 less than or equal to x less th an or equal to 1, crystals was studied. The effect of various types of diso rdering upon the optical absorption processes in Cu6P(S1-xSex)(5)I crystals is discussed.