Mechanical Properties of Single Crystal Organic–Inorganic Hybrid Perovskite MAPbX3 (MA = CH3NH3, X = Cl, Br, I)
Author:
Li Jianyu1ORCID, Ge Chunyu2, Zhao Zifan1, Hu Mingyu1, Wang Jun1, Qian Feng1, Chong Xiaoyu1, Feng Jing1
Affiliation:
1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 2. Faculty of Material Science and Engineering, Jiamusi University, Jiamusi 154007, China
Abstract
Mechanical properties are among the crucial parameters for multilayer hybrid perovskite-based devices. Here, the mechanical properties of the high-quality single-crystalline MAPbX3 (MA = CH3NH3, X = Cl, Br, I), including the hardness (H) and Young’s modulus (E), are systematically studied using the three-dimensional nanoindentation (3D nanoindentation) method. In the sequence of Cl, Br, and I, the hardness and Young’s modulus of MAPbX3 decrease gradually. The hardness of MAPbX3 ranges from 0.31 to 0.57 GPa, and Young’s modulus values are less than 30 GPa. The low hardness and Young’s modulus are attributed to the weak lattice framework composed of Pb-X and the weak hydrogen bond between CH3NH3+ and the octahedron. The relationship between the hardness and Young’s modulus of MAPbX3 is also described. Generally, this work provides the favorable parameters required to further support the design and modification of investigations regarding perovskite-based devices.
Funder
National Key R&D Program of China Natural Science Foundation of China Materials Genome Engineering of Rare and Precious Metal of Yunnan Province Scientific re-search project of basic scientific research funds of provincial colleges in Heilongjiang Province
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces
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