Defect characterization in Bi12GeO20 single crystals by thermoluminescence

Date

2021-05-01

Author

Delice, S.
Isik, M.
Sarıgül, Neslihan
Hasanlı, Nızamı

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

193
views

0
downloads

Bi12GeO20 single crystal grown by Czochralski method was investigated in terms of thermoluminescence (TL) properties. TL experiments were performed for various heating rates between 1 and 6 K/s in the temperature region of 300-675 K. One TL peak with peak maximum temperature of 557 K was observed in the TL spectrum as constant heating rate of 1 K/s was employed. Curve fitting, initial rise and variable heating rate methods were applied to calculate the activation energy of trap level corresponding to this TL peak. Analyses resulted in a presence of one trap center having mean activation energy of 0.78 eV. Heating rate characteristics of revealed trap center was also explored and theoretically well-known behavior that TL intensity decreases and peak maximum temperature increases with heating rates was observed for the trap level. Distribution of trapping levels was studied by thermally cleaning process for different T-stop between 425 and 525 K. Quasi-continuously distributed trapping levels were revealed with mean activation energies ranging from 0.78 to 1.26 eV. Moreover, absorption analysis revealed an optical transition taking place between a defect level and conduction band with an energy difference of 2.51 eV. These results are in good agreement for the presence of intrinsic defects above valence band in Bi12GeO20 crystals.

Subject Keywords

Sillenites, Defects, Luminescence

URI

https://hdl.handle.net/11511/89909

Journal

JOURNAL OF LUMINESCENCE

DOI

https://doi.org/10.1016/j.jlumin.2021.117905

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

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...
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 (...
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...
Structural interpretation of gabbroic rocks in Agacoren Granitoid, central Turkey: field observations and aeromagnetic data Kadioglu, Yk; Ates, A; Güleç, Nilgün Türkan (1998-03-01) Gabbroic rocks crop out commonly in different localities of the Central Anatolian Crystalline Complex and are interpreted by many researchers as the remnants of a Neotethyan ophiolitic suite now observed as roof-pendants in the granitoids of the complex. In this study, the structural position of the gabbroic rocks within one of the granitoids of the Central Anatolian Crystalline Complex, namely the Agacoren Granitoid, is determined by geological and aeromagnetic data from the central part of the pluton. The...
Defect characterization of Ga4Se3S layered single crystals by thermoluminescence IŞIK, MEHMET; Delice, S.; Hasanlı, Nızamı (2016-04-01) Trapping centres in undoped Ga4Se3S single crystals grown by Bridgman method were characterized for the first time by thermoluminescence (TL) measurements carried out in the low-temperature range of 15-300 K. After illuminating the sample with blue light (similar to 470 nm) at 15 K, TL glow curve exhibited one peak around 74 K when measured with a heating rate of 0.4 K/s. The results of the various analysis methods were in good agreement about the presence of one trapping centre with an activation energy of...

Citation Formats

S. Delice, M. Isik, N. Sarıgül, and N. Hasanlı, “Defect characterization in Bi12GeO20 single crystals by thermoluminescence,” JOURNAL OF LUMINESCENCE, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89909.