Intrinsic Charge Transport across Phase Transitions in Hybrid Organo-Inorganic Perovskites

Hee Taek Yi; Xiaoxi Wu; Xiaoyang Zhu; Vitaly Podzorov

doi:10.1002/adma.201600011

Intrinsic Charge Transport across Phase Transitions in Hybrid Organo-Inorganic Perovskites

Adv Mater. 2016 Aug;28(30):6509-14. doi: 10.1002/adma.201600011. Epub 2016 May 17.

Authors

Hee Taek Yi¹, Xiaoxi Wu², Xiaoyang Zhu², Vitaly Podzorov^{1

3}

Affiliations

¹ Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, 08854, USA.
² Department of Chemistry, Columbia University, New York, NY, 10027, USA.
³ Institute for Advanced Materials, Devices and Nanotechnology (IAMDN), Rutgers University, Piscataway, NJ, 08854, USA.

PMID: 27185304
DOI: 10.1002/adma.201600011

Abstract

Hall effect measurements in CH3 NH3 PbBr3 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.

Keywords: Hall effect; acoustic phonon scattering; carrier mobility; hybrid solar cells; lead halide perovskites; organo-inorganic perovskites; polarons.