View : 37 Download: 0

Raman Scattering Studies of the Structural Phase Transitions in Single-Crystalline CH3NH3PbCl3

Title
Raman Scattering Studies of the Structural Phase Transitions in Single-Crystalline CH3NH3PbCl3
Authors
Trang Thi Thu NguyenKim, YejinBae, SoungminBari, MaryamJung, Hye RiJo, WilliamKim, Yong-HoonYe, Zuo-GuangYoon, Seokhyun
Ewha Authors
조윌렴윤석현
SCOPUS Author ID
조윌렴scopus; 윤석현scopus
Issue Date
2020
Journal Title
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
ISSN
1948-7185JCR Link
Citation
JOURNAL OF PHYSICAL CHEMISTRY LETTERS vol. 11, no. 10, pp. 3773 - 3781
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Methylammonium lead trihalide perovskites CH3NH3PbX3 (X = Cl, Br, and I) have recently attracted huge attention as a promising candidate for highly efficient solar cell absorber materials. To understand the physical properties of halide perovskites, we investigated the CH3NH3PbCl3 single crystal by Raman scattering spectroscopy from 80 K to room temperature. Benchmarking the phonon modes and their Raman activities obtained by density functional calculations, we successfully assign the molecular vibrations of methylammonium in the frequency range from 400 to 3300 cm(-1). In the temperature-dependent Raman scattering spectra, the internal vibrational modes of the CH3NH3+ cation are observed in the frequency range above 400 cm(-1) and a number of peaks among them show characteristic changes that reflect the phase transition occurring at about 160 K in CH3NH3PbCl3. A noticeable Raman peak at 2900 cm(-1) persists in a wide range of temperature, suggesting the existence of microcrystalline methylammonium chloride possibly left on the crystal surface from the growth process or spontaneously formed after synthesis.
DOI
10.1021/acs.jpclett.0c00920
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE