TY - JOUR
T1 - Effect of cation rotation on charge dynamics in hybrid lead halide perovskites
AU - Gélvez-Rueda, María C.
AU - Cao, Duyen H.
AU - Patwardhan, Sameer
AU - Renaud, Nicolas
AU - Stoumpos, Constantinos C.
AU - Schatz, George C.
AU - Hupp, Joseph T.
AU - Farha, Omar K.
AU - Savenije, Tom J.
AU - Kanatzidis, Mercouri G.
AU - Grozema, Ferdinand C.
N1 - Funding Information:
The research leading to these results has received funding from the European Research Council Horizon 2020 ERC Grant Agreement No. 648433. The work at Northwestern University was supported as part of the Argonne-Northwestern Solar Energy Research (ANSER) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award Number DE-SC0001059. D.H.C. acknowledges support from the Link Foundation through the Link Foundation Energy Fellowship Program.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/8/4
Y1 - 2016/8/4
N2 - Organic-inorganic hybrid halide perovskites are a promising class of materials for photovoltaic application with reported power efficiencies over ∼22%. However, not much is known about the influence of the organic dipole rotation and phase transitions on charge carrier dynamics. Here, we report substantial changes in mobility and lifetime of charge carriers in CH3NH3PbI3 after the low-temperature tetragonal (β) to orthorhombic (γ) phase transition. By using microwave conductivity measurements, we observed that the mobility and lifetime of ionized charge carriers increase as the temperature decreases and a sudden increment is seen after the β-γ phase transition. For CH3NH3PbI3, the mobility and the half-lifetime increase by a factor of 3-6 compared with the values before the β-γ phase transition. We attribute the considerable change in the dynamics at low temperature to the decrease of the inherent dynamic disorder of the organic cation (CH3NH3+) inside the perovskite crystal structure.
AB - Organic-inorganic hybrid halide perovskites are a promising class of materials for photovoltaic application with reported power efficiencies over ∼22%. However, not much is known about the influence of the organic dipole rotation and phase transitions on charge carrier dynamics. Here, we report substantial changes in mobility and lifetime of charge carriers in CH3NH3PbI3 after the low-temperature tetragonal (β) to orthorhombic (γ) phase transition. By using microwave conductivity measurements, we observed that the mobility and lifetime of ionized charge carriers increase as the temperature decreases and a sudden increment is seen after the β-γ phase transition. For CH3NH3PbI3, the mobility and the half-lifetime increase by a factor of 3-6 compared with the values before the β-γ phase transition. We attribute the considerable change in the dynamics at low temperature to the decrease of the inherent dynamic disorder of the organic cation (CH3NH3+) inside the perovskite crystal structure.
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U2 - 10.1021/acs.jpcc.6b06722
DO - 10.1021/acs.jpcc.6b06722
M3 - Article
AN - SCOPUS:84980599276
SN - 1932-7447
VL - 120
SP - 16577
EP - 16585
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 30
ER -
