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Nonradiative Energy Transfer through Distributed Bands in Piezochemically Synthesized Cesium and Formamidinium Lead Halide Perovskites
| Title: | Nonradiative Energy Transfer through Distributed Bands in Piezochemically Synthesized Cesium and Formamidinium Lead Halide Perovskites |
| Authors: | Sankaramangalam Balachandran, Bhagyalakshmi Browse this author | | Sushant, Ghimire Browse this author | | Kiyonari, Takahashi Browse this author | | Yuyama, Ken‐ichi Browse this author →KAKEN DB | | Takano, Yuta Browse this author | | Nakamura, Takayoshi Browse this author →KAKEN DB | | Biju, Vasudevanpillai Browse this author |
| Keywords: | energy transfer | | perovskite | | photoluminescence | | photon recycling | | piezochemistry |
| Issue Date: | 17-Feb-2020 |
| Publisher: | Wiley |
| Journal Title: | Chemistry – A European Journal |
| Volume: | 26 |
| Issue: | 10 |
| Start Page: | 2133 |
| End Page: | 2137 |
| Publisher DOI: | 10.1002/chem.201904300 |
| Abstract: | Repeated absorption of emitted photons, also called photon recycling, in large crystals and thick films of perovskites leads to delayed photoluminescence (PL) and decrease of PL intensity. The role of distinct band gaps, which act as donors and acceptors of energy, and nonradiative energy transfer on such delayed, low intensity emission is yet to be rationalized. Here we report delayed emission by nonradiative energy transfer across a distribution of energy states in close‐packed crystallites of cesium lead bromide CsPbBr3, formamidinium lead bromide FAPbBr3, or the mixed halide FAPb(BrI)3 perovskite synthesized in the form of thick pellets by the piezochemical method. The PL lifetime of the bromide‐rich domain in the mixed halide pellet is considerably decreased when compared with a pure FAPbBr3 pellet. Here the domains with higher bromide composition act as the energy donor, whereas the iodide‐rich domains are the acceptors. Time‐resolved PL measurements of CsPbBr3, FAPbBr3, and the mixed halide FAPb(BrI)3 perovskite pellets help us to clarify the role of nonradiative energy transfer on photon recycling. |
| Rights: | This is the peer reviewed version of the following article: Bhagyalakshmi, S.B., Ghimire, S., Takahashi, K., Yuyama, K.‐i., Takano, Y., Nakamura, T. and Biju, V. (2020), Nonradiative Energy Transfer through Distributed Bands in Piezochemically Synthesized Cesium and Formamidinium Lead Halide Perovskites. Chem. Eur. J.. doi:10.1002/chem.201904300, which has been published in final form at https://doi.org/10.1002/chem.201904300 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/80457 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: BIJU, Vasudevan Pillai
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