Manipulation of facet orientation in hybrid perovskite polycrystalline films by cation cascade

Guanhaojie Zheng, Cheng Zhu, Jingyuan Ma, Xiaonan Zhang, Gang Tang, Runguang Li, Yihua Chen, Liang Li, Jinsong Hu, Jiawang Hong, Qi Chen (), Xingyu Gao () and Huanping Zhou ()
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Guanhaojie Zheng: Peking University
Cheng Zhu: Beijing Institute of Technology
Jingyuan Ma: University of Chinese Academy of Sciences
Xiaonan Zhang: Chinese Academy of Sciences
Gang Tang: Beijing Institute of Technology
Runguang Li: University of Science and Technology Beijing
Yihua Chen: Peking University
Liang Li: Peking University
Jinsong Hu: University of Chinese Academy of Sciences
Jiawang Hong: Beijing Institute of Technology
Qi Chen: Beijing Institute of Technology
Xingyu Gao: Chinese Academy of Sciences
Huanping Zhou: Peking University

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Crystal orientations in multiple orders correlate to the properties of polycrystalline materials, and it is critical to manipulate these microstructural arrangements to enhance device performance. Herein, we report a controllable approach to manipulate the facet orientation within the ABX3 hybrid perovskites polycrystalline films by cation cascade doping at A-site. Two-dimensional synchrotron radiation grazing incidence wide-angle X-ray scattering is employed to probe the crystal orientations in multiple orders in mixed perovskites thin films, revealing a general pattern to guide crystal planes stacking upon extrinsic doping during crystallization. Different from previous studies, this method enables to adjust the crystal stacking mode of certain crystallographic planes in polycrystalline perovskites. Moreover, the preferred facet orientation is found to facilitate photocarrier transport across the absorber and pertaining interface in the resultant PV device, which provides an exemplary paradigm for further explorations that relate to the microstructures of hybrid perovskite materials and relevant optoelectronics.

Date: 2018
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DOI: 10.1038/s41467-018-05076-w

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