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Characteristics of traps in Tl 2 Ga 2 Se 3 S single crystals by low‐temperature thermoluminescence measurements
Author(s) -
Delice S.,
Gasanly N.M.
Publication year - 2014
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201400140
Subject(s) - thermoluminescence , analytical chemistry (journal) , materials science , activation energy , kinetic energy , luminescence , curve fitting , frequency factor , trap (plumbing) , atomic physics , chemistry , optoelectronics , physics , chromatography , quantum mechanics , machine learning , meteorology , computer science
Defect characterization of Tl 2 Ga 2 Se 3 S single crystals has been performed by thermoluminescence (TL) measurements at low temperatures between 10 and 70 K with various heating rate ranging from 0.6 to 1.0 K/s. The TL signal due to the luminescence from trap centers revealed one glow peak having maximum temperature of 36 K. Curve fitting and various heating rate methods were used for the analysis of the glow curve. The activation energy of 13 meV was found by the application of curve fitting method. This practical method also established that the trap center exhibits the characteristics of mixed (general) kinetic order. In addition, various heating rate analysis gave a compatible result (13 meV) with curve fitting as the temperature lag effect was taken into consideration. Distribution of traps was also investigated using an experimental method. A quasi‐continuous distribution was attributed to the determined trap centers.