Open AccessMechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystall
Author(s) -
Т.N. Nurakhmetov,
K.B. Zhangylyssov,
A.M. Zhunusbekov,
D.H. Daurenbekov,
T.T. Alibay,
B.M. Sadykova,
B.N. Yussupbekova,
D.A. Tolekov
Publication year - 2021
Publication title -
eurasian journal of physics and functional materials
Language(s) - English
Resource type - Journals
eISSN - 2616-8537
pISSN - 2522-9869
DOI - 10.32523/ejpfm.2021050308
Subject(s) - trapping , electron , atomic physics , excitation , vacuum ultraviolet , ultraviolet , spectroscopy , penning trap , recombination , wavelength , trap (plumbing) , chemistry , physics , optics , ecology , biochemistry , quantum mechanics , gene , biology , meteorology
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 SO4− and localization of holes in the form of SO4− radical. Based on the measurement of the spectrum of excitation of 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).