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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-233 |
| Subject |
Exciton dynamics of binary perovskite under laser irradiation |
| Authors |
Weon-Sik Chae
Daegu Center, Korea Basic Science Institute, Korea |
| Abstract |
Recently, perovskite phased materials have been enormously studied because of high solar energy conversion efficiency. Binary and ternary perovskite phase mixing strategy enables facile band-gap engineering in the full visible range. However, the mixed perovskite phase can be degraded under extended and extreme photo-irradiation conditions. Here, we studied the exciton recombination behaviors during the phase separation of binary perovskite by investigating photoluminescence (PL) and time-resolved PL modulation under the different excitation conditions of laser power, excitation line, and irradiation time. The observed PL spectrum of the binary perovskite is divided to three PL peaks under laser irradiation, of which bands are corresponding to the recombination processes of charge carriers' sink, band filling, and the coarsening effect of photo-generated Br-rich phase. These variations in PL and charge carriers’ dynamics were carefully studied with time- and space-resolved confocal microscopy. |
| E-mail |
wschae@kbsi.re.kr |
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121st General Meeting of the KCS