Band structure of alkali metal sulfates

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



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.



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.




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