2021年2月16日
Enhancing the Hot-Phonon Bottleneck Effect in a Metal Halide Perovskite by Terahertz Phonon Excitation
Physical Review Letters
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- 巻
- 126
- 号
- 7
- 開始ページ
- 077401
- 終了ページ
- 077401
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/physrevlett.126.077401
- 出版者・発行元
- American Physical Society (APS)
We investigate the impact of phonon excitations on the photoexcited carrier dynamics in a lead-halide perovskite CH_{3}NH_{3}PbI_{3}, which hosts unique low-energy phonons that can be directly excited by terahertz pulses. Our time-resolved photoluminescence measurements reveal that strong terahertz excitation prolongs the cooling time of hot carriers, providing direct evidence for the hot-phonon bottleneck effect. In contrast to the previous studies where phonons are treated as a passive heat bath, our results demonstrate that phonon excitation can significantly perturb the carrier relaxation dynamics in halide perovskites through the coupling between transverse- and longitudinal-optical phonons.
- リンク情報
- ID情報
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- DOI : 10.1103/physrevlett.126.077401
- ISSN : 0031-9007
- eISSN : 1079-7114
- PubMed ID : 33666485