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Intrinsic Charge Transport across Phase Transitions in Hybrid Organo‐Inorganic Perovskites
Author(s) -
Yi Hee Taek,
Wu Xiaoxi,
Zhu Xiaoyang,
Podzorov Vitaly
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201600011
Subject(s) - materials science , tetragonal crystal system , condensed matter physics , charge (physics) , charge carrier , scattering , piezoelectricity , phase (matter) , carrier scattering , exponent , space charge , phonon , perovskite (structure) , phase transition , phonon scattering , chemical physics , crystallography , electron , optics , optoelectronics , physics , chemistry , linguistics , philosophy , quantum mechanics , composite material
Hall effect measurements in CH 3 NH 3 PbBr 3 single crystals reveal that the charge‐carrier mobility follows an inverse‐temperature power‐law dependence, μ ∝ T − γ , with the power exponent γ = 1.4 ± 0.1 in the cubic phase, indicating an acoustic‐phonon‐dominated carrier scattering, and γ = 0.5 ± 0.1 in the tetragonal phase, suggesting another dominant mechanism, such as a piezoelectric or space‐charge scattering.