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Thermal Conductivity of Suspended Single Crystal CH3NH3PbI3 Platelets at Room Temperature

Abstract

Recently, organic-inorganic lead halide perovskite have gained great attention for its breakthrough in photovoltaic and optoelectronics. However, its thermal transport properties that affecting device lifetime and stability are still rarely explored.In this work, thermal conductivity properties of single crystal CH3NH3PbI3 platelets grown by chemical vapor deposition are studied via non-contact micro-photoluminescence (PL) spectroscopy. We developed a measurement methodology and derived expressions suitable for the thermal conductivity extraction for micro-sized perovskite. The room temperature thermal conductivity of ~0.14 ± 0.02 W/m·K is extracted from the dependence of the PL peak energy on the excitation laser power. With changing the film thickness from 80 to 400 nm, thermal conductivity does not show noticeable variations, indicating that the minimal substrate effects due to the advantage of suspended configuration. The ultra-low thermal conductivity of perovskite, especially thin films, suggests promising applications for thermal isolation, such as thermal insulation and thermo electricity.

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Publication details

The article was received on 21 Mar 2017, accepted on 16 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7NR01894K
Citation: Nanoscale, 2017, Accepted Manuscript
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    Thermal Conductivity of Suspended Single Crystal CH3NH3PbI3 Platelets at Room Temperature

    C. Shen, W. Du, Z. Wu, J. Xing, S. T. Ha, Q. Shang, W. Xu, Q. Xiong, X. Liu and Q. Zhang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR01894K

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