The effect of Fe on the absorption spectra in TlGaS2, TlGa0.99Fe0.01S2 andTlGa0.98Fe0.02S2 layer single crystals

Authors
Gurbulak, B
Citation
B. Gurbulak, The effect of Fe on the absorption spectra in TlGaS2, TlGa0.99Fe0.01S2 andTlGa0.98Fe0.02S2 layer single crystals, PHYS ST S-A, 184(2), 2001, pp. 349-357
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
184
Issue
2
Year of publication
2001
Pages
349 - 357
Database
ISI
SICI code
0031-8965(20010416)184:2<349:TEOFOT>2.0.ZU;2-8
Abstract
TlGaS2, TlGa0.99Fe0.01S2 and TlGa0.98Fe0.02S2 single crystals were grown by the modified Bridgman Stockbarger method. They did not have cracks and voi ds on their surface. The absorption measurements were carried out on TlGaS2 , TlGa0.99Fe0.01S2 and TlGa0.98Fe0.02S2 samples in the temperature range 10 -320 K with steps of 10K. The phonon energies calculated for TlGaS2, TlGa0. 99Fe0.01S2 and TlGa0.98Fe0.02S2 are (19.70 +/- 5), (40.2 +/- 5) and (15.1 /- 5) meV, respectively. The first and second defect levels have been found as 2.423 and 2.569 eV for TlGa0.99Fe0.01S2 and as 2.017 and 2.426 eV for T lGa0.98Fe0.02S2 at 10 K, respectively.