Electron-hole trapping centers in Na2SO4 with a transition metal impurity Mn

Turlybek N. Nurakhmetov, Temirulan T. Alibay, Sapargali Pazylbek, A.M. Zhunusbekov, B.M. Sadykova, D.A. Tolekov, Raushan K. Shamiyeva, Aibek S. Nurpeissov

Eurasian journal of physics and functional materials, 2023

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DOI 10.32523/ejpfm.2023070102

Data confidence 70 medium

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Abstract

The Na 2 SO 4 samples were obtained by slow evaporation method. The mechanisms of the formation of electron and hole trapping centers are investigated by spectroscopic methods. Intrinsic recombination emission of 2.9–3.1 eV and impurity emission of 1.85 eV are excited at 4.0–4.5 eV. Intrinsic SO 3− 4 −SO − 4 and impurity Mn + − SO − 4 trapping centers were revealed. The local levels corresponding between the electron and hole trapping center are 4.0–4.5 eV. The decay of intrinsic and impurity trapping centers was recorded at temperatures of 130–150 K and 280–350 K.