Efficient Thermal Conductance in Organometallic Perovskite CH3NH3PbI3 Films

Authors

Qi Chen, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Chunfeng Zhang, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Mengya Zhu, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Shenghua Liu, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Mark Siemens, University of DenverFollow
Shuai Gu, Nanjing University
Jia Zhu, Nanjing University
Jiancang Shen, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Xinglong Wu, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Chen Liao, Advanced Photonic Center, Southeast University
Jiayu Zhang, Advanced Photonic Center, Southeast University
Xiaoyong Wang, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Min Xiao, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, University of Arkansas

Publication Date

2-22-2016

Document Type

Article

Organizational Units

Physics and Astronomy

Keywords

Organic compounds, Raman spectroscopy, Thermal conductivity, Chemical elements, Perovskites, Phase transitions, Optoelectronic applications, Semiconductors, Optoelectronic devices, Thermal transport

Abstract

Perovskite-based optoelectronic devices have shown great promise for solar conversion and other optoelectronic applications, but their long-term performance instability is regarded as a major obstacle to their widespread deployment. Previous works have shown that the ultralow thermal conductivity and inefficient heat spreading might put an intrinsic limit on the lifetime of perovskite devices. Here, we report the observation of a remarkably efficient thermal conductance, with a conductivity of 11.2 ± 0.8 W m−1 K−1 at room temperature, in densely packed perovskite CH3NH3PbI3 films, via noncontact time-domain thermal reflectance measurements. The temperature-dependent experiments suggest the important roles of organic cations and structural phase transitions, which are further confirmed by temperature-dependent Raman spectra. The thermal conductivity at room temperature observed here is over one order of magnitude larger than that in the early report, suggesting that perovskite device performance will not be limited by thermal conductance.

Publication Statement

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Recommended Citation

Chen, Qi, et al. “Efficient Thermal Conductance in Organometallic Perovskite CH3NH3PbI3 Films.” Applied Physics Letters, vol. 108, no. 8, 2016, p. 81902. doi: 10.1063/1.4942779.