Title: Ultralow thermal conductivity in all-inorganic halide perovskites

Abstract

Controlling the flow of thermal energy is crucial to numerous applications ranging from microelectronic devices to energy storage and energy conversion devices. Here in this paper, we report ultralow lattice thermal conductivities of solution-synthesized, single-crystalline all-inorganic halide perovskite nanowires composed of CsPbI₃ (0.45 ± 0.05 W·m^-1 ·K^-1), CsPbBr₃ (0.42 ± 0.04 W·m^-1·K^-1), and CsSnI₃ (0.38 ± 0.04 W·m^-1 ·K^-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, CsSnI₃ possesses a rare combination of ultralow thermal conductivity, high electrical conductivity (282 S·cm^-1), and high hole mobility (394 cm² ·V^-1 ·s^-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.

Authors:

Lee, Woochul  ^[1];

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Li, Huashan ^[2]; Wong, Andrew B. ^[3]; Zhang, Dandan ^[3]; Lai, Minliang ^[4]; Yu, Yi ^[3]; Kong, Qiao ^[4]; Lin, Elbert ^[4]; Urban, Jeffrey J. ^[5]; Grossman, Jeffrey C. ^[2]; Yang, Peidong ^[6]

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+ Show Author Affiliations

1. Department of Chemistry, University of California, Berkeley, CA 94720,, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139,
3. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
4. Department of Chemistry, University of California, Berkeley, CA 94720,
5. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
6. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Materials Science and Engineering, University of California, Berkeley, CA 94720,, Kavli Energy NanoScience Institute, Berkeley, CA 94720

Publication Date:

Mon Jul 31 00:00:00 EDT 2017

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

OSTI Identifier:

1373422

Alternate Identifier(s):

OSTI ID: 1421807

Grant/Contract Number:  

AC02-05CH11231

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 114 Journal Issue: 33; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; halide perovskite; thermal conductivity; thermal transport; nanowire; thermoelectrics