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

Zheng, Zhuang-Hao, Fan, Ping, Luo, Jing-Ting, Liang, Guang-Xing, Ma, Hongli, Zhang, Xianghua, Yang, Chang and Fu, Yong Qing (2018) High-performance p-type inorganic-organic hybrid thermoelectric thin films. Nanoscale, 10 (28). pp. 13511-13519. ISSN 2040-3364

Text (Full text) Zheng et al - High-performance p-type inorganic-organic hybrid thermoelectric thin films AAM.docx - Accepted Version Download (4MB)

Abstract

The performance of organic-inorganic hybrid thermoelectric thin films can be dramatic enhanced by optimizing energy filtering and carriers 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, then the annealing process was used in order to form the homogeneous organic-inorganic hybrid thin films. Results revealed that the introduced organic component can promote thin film growth and develop a dense nanostructure with an 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 to prepare efficient preparation method of high-performance thermoelectric thin films.

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