Low-Temperature Thermo luminescence Studies on TlInS2 Layered Single Crystals

Isik, M.
Delice, S.
Hasanlı, Nızamı
Thermoluminescence characteristics of TlInS2 layered single crystals grown by the Bridgman method were investigated in the low temperature range of 10-300 K. The illuminated sample with blue light (approximate to 470 nm) at 10 K was heated at constant heating rate. Curve fitting, initial rise and various heating rate methods were used to determine the activation energy of the trap levels. All applied methods showed good consistency about the presence of five trapping centers located at 14, 19, 350, 420, and 520 meV. Behavior of the TL curve for various heating rates was investigated. Traps distribution has also been studied. The activation energies of the distributed trapping centers were found to be increasing from 14 to 46 meV.


Low-temperature thermoluminescence study of GaSe: Mn layered single crystals
Delice, S.; Hasanlı, Nızamı (Informa UK Limited, 2016-01-12)
Mangan doped GaSe single crystals have been studied by thermoluminescence measurements performed with various heating rates between 0.4 and 1.0 K/s in the temperature range of 10-300 K. Thermoluminescence spectra exhibited four distinguishable peaks having maximum temperatures at 47, 102, 139 and 191 K revealing the existence of trapping levels in the crystals. Curve fitting and initial rise methods were applied to observed peaks to determine the activation energies of four trapping levels. Capture cross-se...
Low temperature thermoluminescence study of some ternary and quaternary layered structured semiconductors
Delice, Serdar; Hasanlı, Nızamı; Department of Physics (2016)
Thermoluminescence (TL) experiments for ternary and quaternary layered single crystals were carried out in 10−300 K temperature range by employing various heating rates between 0.2 and 1.2 K/s. The TL emissions coming from the trapping centers in the studied samples brought out the TL spectra exhibiting peaks at different temperature regions for each crystals. These peaks were taken under consideration to reveal the TL properties of the associated trap levels. Characterizations of defect centers existing in...
Low-temperature thermoluminescence in TlGaS2 layered single crystals
Isik, M.; Bulur, Enver; Hasanlı, Nızamı (2013-03-01)
Thermoluminescence (TL) measurements have been carried out on TlGaS2 layered single crystals in the temperature range of 10-300 K. After illuminating with blue light (similar to 470 nm) at 10 K, TL glow curves exhibited peaks around 23, 36, 58, 75 and 120 K when measured with a heating rate of 0.8 K/s. The observed peaks were analyzed using curve fitting, initial rise, and peak shape methods to determine the activation energies of the associated defect centers. Analyses have revealed the presence of five de...
Temperature dependence of Raman-active modes of TlGaS2 layered crystals: An anharmonicity study
Yuksek, NS; Hasanlı, Nızamı; Ozkan, H; Aydinli, A (2004-08-01)
The temperature dependence (16 - 300 K) of unpolarized Raman spectra from TlGaS2 layered crystals was measured in the frequency range of 10 - 400 cm(-1). The analysis of the experimental data showed that the temperature dependencies of the phonon frequencies and linewidths were well described by considering the contributions from thermal expansion and lattice anharmonicity. The anharmonic contribution (phonon-phonon coupling) was found to be due to three-phonon processes. The present work demonstrates that ...
Low-temperature absorption edge and photoluminescence in layered structured Tl2Ga2S3Se single crystals
Hasanlı, Nızamı (2012-11-01)
The absorption edge of undoped Tl2Ga2S3Se crystals have been studied through transmission and reflection measurements in the wavelength range 440-1100 nm and in the temperature range 10-300 K. The absorption edge was observed to shift toward lower energy values with increasing temperature. As a result, the rate of the indirect band gap variation with temperature gamma = -2.6 x 10(-4) eV/K and the absolute zero value of the band gap energy E-gi(0)=2.42 eV were obtained.
Citation Formats
M. Isik, S. Delice, and N. Hasanlı, “Low-Temperature Thermo luminescence Studies on TlInS2 Layered Single Crystals,” ACTA PHYSICA POLONICA A, pp. 1299–1303, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34624.