Trapping levels in TlGaSe2 single crystals

Date

2013-07-25

Author

Ozdemir, Selahattin
ALTINDAL, ŞEMSETTİN

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Charge trapping centers in TlGaSe2 single crystals were investigated by the use of thermally stimulated current (TSC) technique. The measurements of TSC spectra in the temperature range from 90 K to 300 K were performed at a constant heating rate. The measurements showed that there are several trapping levels associated with the complex structure of overlapping peaks in the spectrum. The TSC spectra are dominated by two levels appeared at 204.1 K and 220.1 K. The experimental results indicate that the traps in TlGaSe2 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 the concentrations of the corresponding eight discrete levels, are computed. These centers all having high capture cross sections are found to be at the energies of 0.20 eV, 0.22 eV, 0.26 eV, 0.31 eV, 0.35 eV, 0.49 eV, 0.60 eV and 0.67 eV with low concentrations of 8.9 x 10(13), 7.8 x 10(13), 1.1 x 10(14), 3.5 x 10(13), 4.4 x 10(13), 3.8 x 10(13), 9.8 x 10(14) and 8.8 x 10(14) cm(-3), respectively. (C) 2013 Elsevier B. V. All rights reserved.

Subject Keywords

Mechanical Engineering, Materials Chemistry, Mechanics of Materials, Metals and Alloys

URI

https://hdl.handle.net/11511/64922

Journal

JOURNAL OF ALLOYS AND COMPOUNDS

DOI

https://doi.org/10.1016/j.jallcom.2013.03.017

Collections

Department of Physics, Article

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Citation Formats

S. Ozdemir and Ş. ALTINDAL, “Trapping levels in TlGaSe2 single crystals,” JOURNAL OF ALLOYS AND COMPOUNDS, pp. 108–111, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64922.