Role of Compositional Tuning on Thermoelectric Parameters of Hybrid Halide Perovskites
KAUST DepartmentKAUST Solar Center
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberOSR-CRG2018-3737
Online Publication Date2019-05-31
Print Publication Date2019-06-20
Embargo End Date2020-05-31
Permanent link to this recordhttp://hdl.handle.net/10754/656055
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AbstractHalide perovskites are emerging as a new class of materials for thermoelectric applications owing to their low thermal conductivity and high Seebeck coefficient (thermopower). In this work, the thermoelectric parameters of vapor-deposited hybrid perovskite thin films are explored for the first time. We establish a relationship between the chemical composition and thermoelectric properties of sequentially vapor-deposited CH3NH3PbI3 films. A composition-dependent grain size and in-plane electrical conductivity evolution is observed and its influence on thermoelectric properties is analyzed. An ultralow in-plane thermal conductivity of 0.32 ± 0.03 W m–1 K–1 at room temperature is recorded for CH3NH3PbI3 using a chip-based 3ω method. Thermal conductivity measurement of a series of CH3NH3PbI3 films reveals that the thermal transport is governed by the Pb–I lattice at room temperature. Furthermore, n- and p-type CH3NH3PbI3 films achieved by compositional tuning exhibit high negative (6500 μV/K) and positive (5500 μV/K) thermopower.
CitationHaque, M. A., Nugraha, M. I., Paleti, S. H. K., & Baran, D. (2019). Role of Compositional Tuning on Thermoelectric Parameters of Hybrid Halide Perovskites. The Journal of Physical Chemistry C, 123(24), 14928–14933. doi:10.1021/acs.jpcc.9b02830
SponsorsThis publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-CRG2018-3737.
PublisherAmerican Chemical Society (ACS)