In situ dynamic observations of perovskite crystallisation and microstructure evolution intermediated from [PbI6]4– cage nanoparticles

Hu, Qin; Zhao, Lichen; Wu, Jiang; Gao, Ke; Luo, Deying; Jiang, Yufeng; Zhang, Ziyi; Zhu, Chenhui; Schaible, Eric; Hexemer, Alexander; Wang, Cheng; Liu, Yi; Zhang, Wei; Gratzel, Michael; Liu, Feng; Russell, Thomas P.; Zhu, Rui; Gong, Qihuang

doi:10.1038/ncomms15688

Title: In situ dynamic observations of perovskite crystallisation and microstructure evolution intermediated from [PbI₆]^4– cage nanoparticles

Journal Article · Wed Jun 21 00:00:00 EDT 2017 · Nature Communications

DOI:https://doi.org/10.1038/ncomms15688· OSTI ID:1379893

^[1]; Zhao, Lichen ^[2]; Wu, Jiang ^[3]; Gao, Ke ^[4]; Luo, Deying ^[3]; Jiang, Yufeng ^[4]; Zhang, Ziyi ^[4]; Zhu, Chenhui ^[4]; Schaible, Eric ^[4]; Hexemer, Alexander ^[4];

^[4]; Liu, Yi ^[4]; Zhang, Wei ^[5]; Gratzel, Michael ^[6]; Liu, Feng ^[7]; Russell, Thomas P. ^[8];

^[9]; Gong, Qihuang ^[9]

Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Peking Univ., Beijing (China); Ecole Polytechnique Federale de Lausanne, Lausanne (Switzerland)
Peking Univ., Beijing (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of Surrey, Surrey (United Kingdom)
Ecole Polytechnique Federale de Lausanne, Lausanne (Switzerland)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Shanghai Jiaotong Univ., Shanghai (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Massachusetts, Amherst, MA (United States)
Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Shanxi Univ. Shanxi (China)

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 crystallisation kinetics and growth mechanism in real time from liquid precursor continually to the final uniform film. We utilize some advanced in situ characterisation 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 crystallisation-depletion mechanism is developed to elucidate the periodic crystallisation 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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1379893

Journal Information:: Nature Communications, Vol. 8; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 162 works

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Title: In situ dynamic observations of perovskite crystallisation and microstructure evolution intermediated from [PbI₆]^4– cage nanoparticles