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.
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
This publication is cited in the following 14 articles:
N. Baki, Y.A. Khachai, F. Chiker, H. Khachai, I. Chebbab, R. Khenata, A. Bouhemadou, S. Bin-Omran, N. Badi, Materials Science in Semiconductor Processing, 182 (2024), 108717