Optical properties of CH3NH3PbI3 crystal grown using inverse temperature crystallization
- Authors
- Jo, Hyun-Jun; Park, Dae Young; So, Mo Geun; Kim, Yongmin; Kim, Jong Su; Jeong, Mun Seok
- Issue Date
- Jan-2019
- Publisher
- 한국물리학회
- Keywords
- Exciton; MAPbI3; Perovskite; Phase transition; Photoluminescence
- Citation
- Current Applied Physics, v.19, no.1, pp.60 - 65
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Current Applied Physics
- Volume
- 19
- Number
- 1
- Start Page
- 60
- End Page
- 65
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/148452
- DOI
- 10.1016/j.cap.2018.11.009
- ISSN
- 1567-1739
- Abstract
- Perovskite CH3NH3PbI3 (MAPbI(3)) single crystal was grown using inverse temperature crystallization method. Crystallinity of the perovskite was confirmed by X-ray diffraction. Photoluminescence (PL) spectra revealed abnormal behavior due to a temperature-induced orthorhombic to the tetragonal phase transition. Four PL emission peaks, A, B, C, and D, were observed in the low temperature regime. Peaks A and B were observed at 756 and 776 nm at 12 K, and were blue-shifted and disappeared at 130 and 70 K, respectively. Peaks C and D were observed at 789 and 807 nm at 40 K and were also blue-shifted to 780 and 794 nm at 100 K. On the other hand, the peak C red-shifted to 799 nm from 100 to 140 K because of an orthorhombic to the tetragonal phase change and was also blue-shifted above 140 K. From the excitation intensity- and temperature-dependent PL results, peaks A and B were assigned to the free-exciton and bound-exciton of the orthorhombic phase crystal, respectively. In addition, peaks C and D were associated with the free-exciton and bound-exciton of the tetragonal phase crystal, respectively. The activation energy of peak C was calculated to be 98 meV from temperature dependence of the PL intensity.
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