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In-Situ Dynamic Observations of Perovskite Crystallization and Microstructure Evolution Intermediated from [PbI6]4- Cage Nanoparticles

Hu, Q, Zhao, L, Wu, J, Gao, K, Luo, D, Jiang, Y, Zhang, Z, Zhu, C, Schaible, E, Hexemer, A , Wang, C, Liu, Y, Zhang, Wei, Grätzel, M, Liu, F, Russell, TP, Zhu, R and Gong, Q (2017) In-Situ Dynamic Observations of Perovskite Crystallization and Microstructure Evolution Intermediated from [PbI6]4- Cage Nanoparticles Nature Communications, 8, 15688.

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Hybrid lead halide perovskites have emerged as high-performance photovoltaic materials with their extraordinary optoelectronic properties. In particular, the remarkable device efficiency is strongly influenced by the perovskite crystallinity and the film morphology. Here, we investigate the perovskites crystallization kinetics and growth mechanism in real time from liquid precursor continually to the final uniform film. We utilize some advanced in-situ characterization techniques including synchrotron-based grazing incident X-ray diffraction to observe crystal structure and chemical transition of perovskites. The nano-assemble model from perovskite intermediated [PbI6]4- cage nanoparticles to bulk polycrystals is proposed to understand perovskites formation at a molecular- or nano-level. A crystallization-depletion mechanism is developed to elucidate the periodic crystallization and the kinetically trapped morphology at a mesoscopic level. Based on these in-situ dynamics studies, the whole process of the perovskites formation and transformation from the molecular to the microstructure over relevant temperature and time scales is successfully demonstrated.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Hu, Q
Zhao, L
Wu, J
Gao, K
Luo, D
Jiang, Y
Zhang, Z
Zhu, C
Schaible, E
Hexemer, A
Wang, C
Liu, Y
Grätzel, M
Liu, F
Russell, TP
Zhu, R
Gong, Q
Date : 21 June 2017
DOI : 10.1038/ncomms15688
Copyright Disclaimer : Copyright The Author(s) 2017. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Depositing User : Melanie Hughes
Date Deposited : 13 Jun 2017 16:58
Last Modified : 16 Jan 2019 18:53

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