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Photon Energy-Dependent Ultrafast Photoinduced Terahertz Response in a Microcrystalline Film of CH3NH3PbBr3
https://repo.qst.go.jp/records/80186
https://repo.qst.go.jp/records/80186777c7c4e-5f72-46e2-854b-402612f02484
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-05-08 | |||||
| タイトル | ||||||
| タイトル | Photon Energy-Dependent Ultrafast Photoinduced Terahertz Response in a Microcrystalline Film of CH3NH3PbBr3 | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Okochi, Hiroto
× Okochi, Hiroto× Katsuki, Hiroyuki× Tsubouchi, Masaaki× Itakura, Ryuji× Yanagi, Hisao× Tsubouchi, Masaaki× Itakura, Ryuji |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Time-resolved terahertz (THz) spectroscopy is applied for a microcrystalline film of methylammonium lead bromide perovskite, CH3NH3PbBr3, to observe the carrierdynamics around the band edge. The ultrafast response of the transmitted THz electric field amplitude after carrier generation is modeled with a biexponential curve with ∼ 5 and 180 ps time constants, which are ascribed to Auger and electron − hole recombination processes, respectively. From the pump photon energy dependence of the time evolution of the THz electric field amplitude, it is shown that the bound exciton states and free interband excited carrier states show a clearly different temporal response. These measurements support the idea that the bound excitons generated in CH 3NH3PbBr3 remain as stable excitons even at room temperature (RT). This is in clear contrast to the cases in CH3NH3PbI3 in which the excitons and band-edge free carriers are interchangeable at RT. | |||||
| 書誌情報 |
The Journal of Physical Chemistry Letters 巻 11, 号 15, p. 6068-6076, 発行日 2020-07 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1948-7185 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1021/acs.jpclett.0c01393 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://pubs.acs.org/doi/10.1021/acs.jpclett.0c01393 | |||||
