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This article is cited in 13 scientific papers (total in 13 papers)
CONDENSED MATTER
Terahertz vibrational modes in CH$_3$NH$_3$PbI$_3$ and CsPbI$_3$ perovskite films
A. V. Andrianova, A. N. Aleshina, L. B. Matyushkinb a Ioffe Physical–Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia
b St. Petersburg State Electrotechnical University LETI, St. Petersburg, Russia
Abstract:
Films of CH$_3$NH$_3$PbI$_3$ organometallic perovskite, which is currently considered as a promising basic material for new-generation solar cells, as well as films containing CsPbI$_3$ inorganic lead-halid perovskite nanocrystals, have been studied in the spectral range of 0.2–2.9 THz at room temperature by terahertz time-domain spectroscopy. Several low-frequency vibrational modes previously attributed exclusively to vibrations of Pb-I bonds have been observed in the perovskite films under investigation in this spectral range. The comparison of terahertz characteristics of perovskites under study has shown that vibrations associated with a cation (CH$_3$ NH$_3^+$, Cs$^+$) make a significant contribution to the formation of the observed low-frequency vibrational modes in perovskites under consideration.
Received: 18.09.2018 Revised: 26.10.2018 Accepted: 08.11.2018
Citation:
A. V. Andrianov, A. N. Aleshin, L. B. Matyushkin, “Terahertz vibrational modes in CH$_3$NH$_3$PbI$_3$ and CsPbI$_3$ perovskite films”, Pis'ma v Zh. Èksper. Teoret. Fiz., 109:1 (2019), 30–35; JETP Letters, 109:1 (2019), 28–32
Linking options:
https://www.mathnet.ru/eng/jetpl5787 https://www.mathnet.ru/eng/jetpl/v109/i1/p30
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