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Photon Energy-Dependent Ultrafast Photoinduced Terahertz Response in a Microcrystalline Film of CH3NH3PbBr3

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dc.contributor.author Okochi, Hiroto en
dc.contributor.author Katsuki, Hiroyuki en
dc.contributor.author Tsubouchi, Masaaki en
dc.contributor.author Itakura, Ryuji en
dc.contributor.author Yanagi, Hisao en
dc.date.accessioned 2021-07-29T23:22:41Z en
dc.date.available 2021-07-29T23:22:41Z en
dc.date.issued 2020-07-07 en
dc.identifier.uri http://hdl.handle.net/10061/14433 en
dc.description.abstract Time-resolved terahertz (THz) spectroscopy is applied for a microcrystalline film of methylammonium lead bromide perovskite, CH3NH3PbBr3, to observe the carrier dynamics 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 CH3NH3PbBr3 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. ja
dc.language.iso en en
dc.publisher American Chemical Society en
dc.relation.isversionof https://pubs.acs.org/doi/10.1021/acs.jpclett.0c01393 en
dc.rights © 2020 American Chemical Society ja
dc.title Photon Energy-Dependent Ultrafast Photoinduced Terahertz Response in a Microcrystalline Film of CH3NH3PbBr3 en
dc.type.nii Journal Article en
dc.contributor.transcription オオコウチ, ヒロト ja
dc.contributor.transcription カツキ, ヒロユキ ja
dc.contributor.transcription ツボウチ, マサアキ ja
dc.contributor.transcription イタクラ, リュウジ ja
dc.contributor.transcription ヤナギ, ヒサオ ja
dc.contributor.alternative 大河内, 裕斗 ja
dc.contributor.alternative 香月, 浩之 ja
dc.contributor.alternative 坪内, 雅明 ja
dc.contributor.alternative 板倉, 隆二 ja
dc.contributor.alternative 柳, 久雄 ja
dc.textversion author en
dc.identifier.eissn 1948-7185 en
dc.identifier.jtitle Journal of Physical Chemistry Letters en
dc.identifier.volume 11 en
dc.identifier.issue 15 en
dc.identifier.spage 6068 en
dc.identifier.epage 6076 en
dc.relation.doi 10.1021/acs.jpclett.0c01393 en
dc.identifier.NAIST-ID 73298986 en
dc.identifier.NAIST-ID 73293383 en
dc.relation.pmid 32635728 en

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