Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals

The exciton relaxation process of CsPbI(3) perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy. The hot exciton relaxation process is confirmed to exist in the CsPbI(3) NCs, through comparing the TA data of CsPbI(3) NCs in low and high energy excitonic...

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Autores principales: Liu, Qinghui, Wang, Yinghui, Sui, Ning, Wang, Yanting, Chi, Xiaochun, Wang, Qianqian, Chen, Ying, Ji, Wenyu, Zou, Lu, Zhang, Hanzhuang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4942613/
https://www.ncbi.nlm.nih.gov/pubmed/27405786
http://dx.doi.org/10.1038/srep29442
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author Liu, Qinghui
Wang, Yinghui
Sui, Ning
Wang, Yanting
Chi, Xiaochun
Wang, Qianqian
Chen, Ying
Ji, Wenyu
Zou, Lu
Zhang, Hanzhuang
author_facet Liu, Qinghui
Wang, Yinghui
Sui, Ning
Wang, Yanting
Chi, Xiaochun
Wang, Qianqian
Chen, Ying
Ji, Wenyu
Zou, Lu
Zhang, Hanzhuang
author_sort Liu, Qinghui
collection PubMed
description The exciton relaxation process of CsPbI(3) perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy. The hot exciton relaxation process is confirmed to exist in the CsPbI(3) NCs, through comparing the TA data of CsPbI(3) NCs in low and high energy excitonic states. In addition, the Auger recombination and intrinsic decay paths also participate in the relaxation process of CsPbI(3) NCs, even the number of exciton per NC is estimated to be less than 1. Excitation intensity-dependent TA data further confirms the existence of Auger recombination. Meanwhile, the spectral data also confirms that the weight of hot exciton also increase together with that of Auger recombination at high excitation intensity when CsPbI(3) NCs in high energy excitonic states.
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spelling pubmed-49426132016-07-20 Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals Liu, Qinghui Wang, Yinghui Sui, Ning Wang, Yanting Chi, Xiaochun Wang, Qianqian Chen, Ying Ji, Wenyu Zou, Lu Zhang, Hanzhuang Sci Rep Article The exciton relaxation process of CsPbI(3) perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy. The hot exciton relaxation process is confirmed to exist in the CsPbI(3) NCs, through comparing the TA data of CsPbI(3) NCs in low and high energy excitonic states. In addition, the Auger recombination and intrinsic decay paths also participate in the relaxation process of CsPbI(3) NCs, even the number of exciton per NC is estimated to be less than 1. Excitation intensity-dependent TA data further confirms the existence of Auger recombination. Meanwhile, the spectral data also confirms that the weight of hot exciton also increase together with that of Auger recombination at high excitation intensity when CsPbI(3) NCs in high energy excitonic states. Nature Publishing Group 2016-07-12 /pmc/articles/PMC4942613/ /pubmed/27405786 http://dx.doi.org/10.1038/srep29442 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Liu, Qinghui
Wang, Yinghui
Sui, Ning
Wang, Yanting
Chi, Xiaochun
Wang, Qianqian
Chen, Ying
Ji, Wenyu
Zou, Lu
Zhang, Hanzhuang
Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title_full Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title_fullStr Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title_full_unstemmed Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title_short Exciton Relaxation Dynamics in Photo-Excited CsPbI(3) Perovskite Nanocrystals
title_sort exciton relaxation dynamics in photo-excited cspbi(3) perovskite nanocrystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4942613/
https://www.ncbi.nlm.nih.gov/pubmed/27405786
http://dx.doi.org/10.1038/srep29442
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