Journal
NANOSCALE
Volume 10, Issue 28, Pages 13511-13519Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr02065e
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Funding
- National Natural Science Foundation of China [11604212]
- Key Platform and Research Projects
- Education and Research of Guangdong Province [2015KQNCX139]
- Basic Research Program of Shenzhen [JCYJ20160307113206388]
- Shenzhen Key Lab Fund [ZDSYS 20170228105421966]
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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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