Characteristics of traps in TlInS2 single crystals

ÖZDEMİR S., Bucurgat M.

CURRENT APPLIED PHYSICS, vol.13, no.9, pp.1948-1952, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 9
  • Publication Date: 2013
  • Doi Number: 10.1016/j.cap.2013.07.020
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1948-1952
  • Middle East Technical University Affiliated: Yes


Characteristics of charge traps in TlInS2 single crystals are investigated by the use of thermally stimulated current (TSC) technique. The TSC spectra of the sample from 80 K to 300 K are recorded at a constant heating rate. The spectra reveal that there are several trapping levels associated with the complex structure of overlapping peaks. The experimental results indicate that the traps in TlInS2 associated with the spectra in the measuring range of temperature obey the monomolecular (first order) kinetics. Thus, the spectra are resolved into first order shaped peaks by the use of computerized best fit procedure. The trapping parameters; such as the energy depth, temperature dependent frequency factor and capture cross section, together with concentrations of the corresponding six discrete levels are computed. These centers all having low capture cross sections with strong temperature dependence are found to be at the energies of 0.11 eV, 0.22 eV, 0.25 eV, 0.26 eV, 0.29 eV and 0.30 eV with high concentrations of 6.6 x 10(16), 2.0 x 10(17), 3.3 x 10(17), 9.6 x 10(16), 2.3 x 10(17) and 4.0 x 10(17) cm(-3), respectively. (C) 2013 Elsevier B. V. All rights reserved.