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Enhanced thermoelectric properties of Sb2Te3/CH3NH3I hybrid thin films by post-annealing

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Abstract

In this work, to improve the ZT value of Sb2Te3, a novel concept of inorganic–organic hybridization is presented and Sb2Te3/CH3NH3I hybrid thin films have been prepared via a post-annealing involved sequential sputtering/evaporation method. The results show that the crystallinity of the thin films is greatly improved after post-annealing with preferential orientations of (006) and (009) at an appropriate temperature, leading to an obvious enhancement of electrical conductivity. Additionally, the hybrid thin films show uniform nano-sized grainy structures and the organic component CH3NH3I has been successfully incorporated into the hybrid system in a stable state, thus resulting in an increase of the Seebeck coefficient and decrease of the thermal conductivity based on the energy filtering effect. As expected, a maximum room-temperature ZT value of 0.56 for the Sb2Te3/CH3NH3I hybrid thin film annealed at 573 K can be obtained. This outcome further demonstrates great potential for the inorganic–organic hybrid thin film in low temperature application scenarios.

Graphical abstract: Enhanced thermoelectric properties of Sb2Te3/CH3NH3I hybrid thin films by post-annealing

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Publication details

The article was received on 16 Sep 2019, accepted on 26 Oct 2019 and first published on 28 Oct 2019


Article type: Research Article
DOI: 10.1039/C9QI01188A
Inorg. Chem. Front., 2020, Advance Article

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    Enhanced thermoelectric properties of Sb2Te3/CH3NH3I hybrid thin films by post-annealing

    S. Chen, F. Li, Y. Chen, J. Luo, G. Liang, X. Zhang, Z. Zheng and P. Fan, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QI01188A

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