Публікація: Exciton absorption spectra of KPb2Br5 thin films
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Дата
2016
Назва журналу
ISSN журналу
Назва тома
Видавництво
Institute for Single Crystals
Анотація
The absorption spectrum of KPb2Br5 thin film of tetragonal (I) and monoclinic (II) structures were investigated in the spectral region of 2-6 eV and the temperature range 90-440K. It was found that KPb2Br5 (I) of the tetragonal structure irreversibly becomes in KPb2Br5(II) of the monoclinic structure when T = 293 K. It is found that low-frequency exciton excitations of KPb2Br5 (I, II) are localized in the sublattice, which contains ions Pb2+, and its are two-dimensional nature.
Опис
Ключові слова
thin films, absorption spectra, exitons, phase transition
Бібліографічний опис
Kovalenko E. N. Exciton absorption spectra of KPb2Br5 thin films / V. V. Kovalenko, E. N. Kovalenko, O. N. Yunakova, N. N. Yunakov // Functional Materials. – 2016. – V, 23, №4. – p. 570-575.