Band structure of alkali metal sulfates


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Authors

  • Т Нурахметов
  • Р Бахтизин
  • Ж Салиходжа
  • А Жунусбеков
  • А Кайнарбай
  • Д Дауренбеков
  • Б Садыкова
  • К Жанылысов
  • Б Юсупбекова

DOI:

https://doi.org/10.32523/2616-6836-2019-126-1-56-66

Abstract

The spectra of the creation of the main emission bands at 3.65 ÷ 4.0 eV and the long-wavelength emission bands at 3.0 ÷ 3.1 eV, 2.6 ÷ 2.7 eV, and 2.3 ÷ 2.4 eV in K2SO4 crystals and Na2SO4 at temperatures of 15-300 K was investigated. It is shown that these emissions are excited by low-energy photons with an energy of 4.6 ÷ 6.2 eV, as well as high-energy photons of 6.4 ÷ 10.5 eV. During excitation, electrons from 1t1 , 3t2 ,e, 2t2 orbitals of the valence band transfer to the state of the cation in the conduction band. Holes arising in these orbitals, float to a level above the valence band and are localized. The main emission of 3.65 ÷ 4.0 eV arises when electrons recombine with these localized holes located above the valence band.

Published

2022-07-04

How to Cite

Нурахметов, Т., Бахтизин, Р., Салиходжа, Ж., Жунусбеков, А., Кайнарбай, А., Дауренбеков, Д., Садыкова, Б., Жанылысов, К., & Юсупбекова, Б. (2022). Band structure of alkali metal sulfates. BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. PHYSICS. ASTRONOMY SERIES, 126(1), 56–66. https://doi.org/10.32523/2616-6836-2019-126-1-56-66

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