Trap distribution in AgIn5S8 single crystals: Thermoluminescence study

Delice, S.
Hasanlı, Nızamı
Distribution of shallow trap levels in AgIn5S8 crystals has been investigated by thermoluminescence (TL) measurements performed below room temperature (10-300 K). One broad TL peak centered at 33 K was observed as constant heating rate of 0.2 K/s was employed for measurement. The peak shape analysis showed that the TL curve could consist of several individual overlapping TL peaks or existence of quasi-continuous distributed traps. Therefore, TL experiments were repeated for different stopping temperatures (T-stop) between 10 and 34 K with constant heating rate of 0.2 K/s to separate the overlapping TL peaks. The E-t vs T-stop indicated that crystal has quasi-continuously distributed traps having activation energies increasing from 13 to 41 meV. Heating rate effect on trapped charge carriers was also investigated by carrying out the TL. experiments with various heating rates between 0.2 and 0.6 K/s for better comprehension of characteristics of existed trap levels. Analyses indicated that the trap levels exhibited the properties of anomalous heating rate behavior which means the TL intensity and area under the TL peak increase with increasing heating rate.


Traps distribution in sol-gel synthesized ZnO nanoparticles
Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (2019-06-15)
The distribution of shallow traps within the sol-gel synthesized ZnO nanoparticles was investigated using thermoluminescence (TL) experiments in the 10-300 K temperature range. TL measurements presented two overlapped peaks around 110 and 155 K. The experimental technique based on radiating the nanoparticles at different temperatures (T-exc.) between 60 and 125 K was carried out to understand the trap distribution characteristics of peaks. It was observed that peak maximum temperature shifted to higher valu...
Determination of trapping center parameters in Tl2In2S3Se layered single crystals by thermally stimulated current measurements
Güler, Işıkhan; Hasanlı, Nızamı (2009-07-01)
As-grown Tl2In2S3Se layered single crystals were studied by thermally stimulated current measurements in the temperature range of 10-170K with different heating rates. Experimental data were analyzed according to various methods such as curve fitting and initial rise. The analysis of thermally stimulated current spectra registered at light excitation temperature T-0 = 10K revealed the trap level located at 30 meV. Attempt-to-escape frequency, concentration and capture cross section of the traps were determi...
Analysis of glow curve of GaS0.5Se0.5 single crystals
IŞIK, MEHMET; Delice, Serdar; Hasanlı, Nızamı (2015-12-01)
Characterization of shallow trapping centers in GaS0.5Se0.5 crystals grown by a Bridgman method was carried out in the present work using thermoluminescence (TL) measurements performed in the low temperature range of 10-300 K. The activation energies of the trapping centers were obtained under the light of results of various analysis methods. The presence of three trapping centers located at 6, 30 and 72 meV was revealed. The analysis of the experimental glow curve gave reasonable results under the model th...
Trapping center parameters in In6S7 crystals
IŞIK, MEHMET; Hasanlı, Nızamı (2011-07-01)
Thermally stimulated current measurements were carried out on In6S7 single crystals in the temperature range of 10-225 K with a constant heating rate of 0.8 K/s. The study of trapping centers was accomplished by the measurements of current flowing along the c-axis of crystals. The analysis of the glow curve according to various methods, such as curve fitting, initial rise and peak shape methods, gives results in good agreement with each other and revealed two trapping centers in In6S7 with activation energi...
Thermoluminescence in gallium sulfide crystals: an unusual heating rate dependence
DELİCE, SERDAR; Bulur, Enver; Hasanlı, Nızamı (2015-03-24)
Trap centres in gallium sulfide single crystals have been investigated by thermoluminescence measurements in the temperature range of 10-230K. A curve-fitting method was utilized to evaluate the activation energies (52, 200 and 304meV) of the revealed three trap centres. The heating rate dependence and trap distribution of the peaks have been studied using experimental techniques based on various heating rates and various illumination temperatures, respectively. An anomalous heating rate dependence of the h...
Citation Formats
S. Delice, M. IŞIK, and N. Hasanlı, “Trap distribution in AgIn5S8 single crystals: Thermoluminescence study,” JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, pp. 53–57, 2018, Accessed: 00, 2020. [Online]. Available: