Traps distribution in sol-gel synthesized ZnO nanoparticles

2019-06-15
Delice, S.
IŞIK, MEHMET
Hasanlı, Nızamı
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 values and activation energy (E-t) increased as irradiating temperature was increased. The E-t vs. T-exc. presented that ZnO nanoparticles have quasi-continuously distributed traps possessing activation energies increasing from 80 to 171 meV.
MATERIALS LETTERS

Suggestions

Trap distribution in AgIn5S8 single crystals: Thermoluminescence study
Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (2018-03-01)
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 (...
Low temperature thermoluminescence behaviour of Y2O3 nanoparticles
Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (2019-01-01)
Y2O3 nanoparticles were investigated using low temperature thermoluminescence (TL) experiments. TL glow curve recorded at constant heating rate of 0.4 K/s exhibits seven peaks around 19, 62, 91, 115, 162, 196 and 215 K. Activation energies and characteristics of traps responsible for observed curves were revealed under the light of results of initial rise analyses and T-max-T-stop experimental methods. Analyses of TL curves obtained at different stopping temperatures resulted in presence of one quasi-contin...
Defect characterization in neodymium doped thallium indium disulfide crystals by thermoluminescence measurements
Delice, S.; Hasanlı, Nızamı (2016-10-15)
Characteristics of defect centers in neodymium doped TlInS2 single crystals have been investigated in virtue of thermoluminescence measurements carried out at low temperatures (10-300 K) with various heating rates between 0.4 and 1.2 K s(-1). One glow peak was detected with peak maximum temperature of 26 K at a rate of 0.4 K s(-1). The observed glow peak was analyzed using three points and heating rate methods. The analysis results revealed the presence of one trap level with activation energy of 14 meV. Th...
Characterization of defect states in Ga-rich gallium arsenide crystals by thermally stimulated current
YILDIRIM, TACETTİN; Hasanlı, Nızamı; TÜZEMEN, Sebahattin (2018-06-01)
The trap levels in Ga-rich GaAs crystals were studied in the temperature range of 10-300 K using thermally stimulated currents (TSC) technique. During the experiments we utilized a constant heating rate of 0.2 K/s. Experimental evidence is found for two electron trapping centers in the crystal with activation energies of 44 and 50 meV. The analysis of the experimental TSC curve suggests slow retrapping. The capture cross sections of the traps were determined as 8.8 x 10(-25) and 1.0 x 10(-25) cm(2) with con...
Determination of trapping parameters of thermoluminescent glow peaks of semiconducting Tl2Ga2S3Se crystals
IŞIK, MEHMET; YILDIRIM, TACETTİN; Hasanlı, Nızamı (2015-07-01)
Thermoluminescence (TL) properties of Tl2Ga2S3Se layered single crystals were researched in the temperature range of 290-770 K. U glow curve exhibited two peaks with maximum temperatures of similar to 373 and 478 K. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of the trapping centers associated with these peaks. Applied methods were in good agreement with the energies of 780 and 950 meV. Capture cross sections and attempt-to-escape frequencies of the trap...
Citation Formats
S. Delice, M. IŞIK, and N. Hasanlı, “Traps distribution in sol-gel synthesized ZnO nanoparticles,” MATERIALS LETTERS, pp. 103–105, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32861.