Enhanced thermoelectric properties of Sb2Te3/CH3NH3I hybrid thin films by post-annealing. Issue 1 (6th November 2019)

• Record Type: Journal Article
• Authors: Chen, Shuo; Li, Fu; Chen, Yuexing; Luo, Jingting; Liang, Guangxing; Zhang, Xianghua; Zheng, Zhuanghao; Fan, Ping
• Is Part Of: Inorganic chemistry frontiers. Volume 7:Issue 1(2020)
• Page Start: 198
• Page End: 203
• Publication Date: 2019-11-06
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9qi01188a
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : An effective post-annealing involved sequential sputtering/evaporation method is used to prepare inorganic–organic Sb2 Te3 /CH3 NH3 I hybrid thin films with improved thermoelectric properties. Abstract : In this work, to improve the ZT value of Sb2 Te3, a novel concept of inorganic–organic hybridization is presented and Sb2 Te3 /CH3 NH3 I 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 CH3 NH3 I 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 Sb2 Te3 /CH3 NH3 I 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.