Mechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystal

Authors

T. N. Nurakhmetov, L.N. Gumilyov Eurasian National University ,Kazakhstan
K. B. Zhangylyssov, L.N. Gumilyov Eurasian National University ,Kazakhstan
A. M. Zhunusbekov, L.N. Gumilyov Eurasian National University ,Kazakhstan
D. H. Daurenbekov, L.N. Gumilyov Eurasian National University ,Kazakhstan
T. T. Alibay, L.N. Gumilyov Eurasian National University ,Kazakhstan
B. M. Sadykova, L.N. Gumilyov Eurasian National University ,Kazakhstan
B. N. Yussupbekova, L.N. Gumilyov Eurasian National University ,Kazakhstan
D. A. Tolekov, L.N. Gumilyov Eurasian National University ,Kazakhstan ,

Abstract

The mechanism of creation of electron-hole trapping centers in CaSO₄ at 15-300 K was investigated by the methods of vacuum-ultraviolet and thermoactivation spectroscopy. It is shown that electron-hole trapping centers are formed upon trap of electrons in the anionic complexes SO₂. and localization 4 of holes in the form of SO. radical. Based on the measurement of the spectrum of excitation of 4 long-wavelength recombination emission at 3.0-3.1 eV and 2.7 eV, the energy distance of the formed electron-hole trapping centers was estimated (4.43 eV and 3.87 eV).

Article Type

Original Study

First Page

235

Last Page

241

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

Recommended Citation

Nurakhmetov, T. N.; Zhangylyssov, K. B.; Zhunusbekov, A. M.; Daurenbekov, D. H.; Alibay, T. T.; Sadykova, B. M.; Yussupbekova, B. N.; and Tolekov, D. A. (2021) "Mechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystal," Eurasian Journal of Physics and Functional Materials: Vol. 5: No. 3, Article 8.
DOI: https://doi.org/10.32523/ejpfm.2021050308