Ultralow thermal conductivity in all-inorganic halide perovskites
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Grossman_Ultralow thermal.pdf
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Author(s)
Lee, Woochul
Li, Huashan
Wong, Andrew B.
Zhang, Dandan
Lai, Minliang
Yu, Yi
Kong, Qiao
Lin, Elbert
Urban, Jeffrey J.
Grossman, Jeffrey C.
Date Issued
July 2017
Journal
Proceedings of the National Academy of Sciences
Publisher
Proceedings of the National Academy of Sciences
Citation
Lee, Woochul, Huashan Li, Andrew B. Wong, Dandan Zhang, Minliang Lai, Yi Yu, Qiao Kong, et al. “Ultralow Thermal Conductivity in All-Inorganic Halide Perovskites.” Proceedings of the National Academy of Sciences 114, no. 33 (July 31, 2017): 8693–8697. © 2017 National Academy of Sciences
Version
Final published version
Abstract
Controlling the flow of thermal energy is crucial to numerous applications ranging from microelectronic devices to energy storage and energy conversion devices. Here, we report ultralow lattice thermal conductivities of solution-synthesized, single-crystalline all-inorganic halide perovskite nanowires composed of CsPbI[subscript 3] (0.45 ± 0.05 W·m[superscript −1] ·K[superscript −1]), CsPbBr[subscript 3] (0.42 ± 0.04 W·m[superscript −1] ·K [superscript −1]), and CsSnI[superscript 3] (0.38 ± 0.04 W·m[superscript −1] ·K[superscript −1]). We attribute this ultralow thermal conductivity to the cluster rattling mechanism, wherein strong optical–acoustic phonon scatterings are driven by a mixture of 0D/1D/2D collective motions. Remarkably, CsSnI[superscript 3] possesses a rare combination of ultralow thermal conductivity, high electrical conductivity (282 S·cm[superscript −1]), and high hole mobility (394 cm[superscript 2] ·V[superscript −1] ·s[superscript −1]). The unique thermal transport properties in all-inorganic halide perovskites hold promise for diverse applications such as phononic and thermoelectric devices. Furthermore, the insights obtained from this work suggest an opportunity to discover low thermal conductivity materials among unexplored inorganic crystals beyond caged and layered structures. Keywords: halide perovski, tethermal conductivity, thermal transport, nanowire, thermoelectrics
MIT Department
Massachusetts Institute of Technology. Center for Materials Science and Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1073/PNAS.1711744114
