High-performance p-type inorganic-organic hybrid thermoelectric thin films

Abstract : The performance of organic-inorganic hybrid thermoelectric thin films can be dramatically enhanced by optimizing energy filtering and carrier transport states at the organic-inorganic interfaces. In this work, p-type "Sb2Te3/CH3NH3I/Sb2Te3" multilayer thin films were firstly fabricated with varied contents of CH3NH3I, and then an annealing process was used in order to form homogeneous organic-inorganic hybrid thin films. The results revealed that the introduced organic component can promote thin film growth and develop a dense nanostructure with improved crystallinity, thus resulting in a significantly increased Seebeck coefficient and a reduced thermal conductivity as a result of the optimized electronic transport characteristics and enhanced effects of phonon scattering. As is expected, the thermoelectric performance of the hybrid-nanocomposite films is enhanced, achieving the maximum ZT value of 1.55 at a temperature of 413 K, which is several times higher than that of the as-fabricated film, thereby suggesting that the proposed strategy can be applied as an efficient method for the preparation of high-performance thermoelectric thin films.
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Submitted on : Tuesday, July 10, 2018 - 10:22:44 AM
Last modification on : Tuesday, September 17, 2019 - 3:04:09 PM

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Zhuang-Hao Zheng, Ping Fan, Jing-Ting Luo, Guang-Xing Liang, Hong-Li Ma, et al.. High-performance p-type inorganic-organic hybrid thermoelectric thin films. Nanoscale, Royal Society of Chemistry, 2018, ⟨10.1039/c8nr02065e⟩. ⟨hal-01834000⟩

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