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Title

Simultaneous Enhancement of Thermoelectric Power Factor and Phase Stability of Tin-Based Perovskites by Organic Cation Doping

Author
Corresponding AuthorShi,Tingting; Kyaw,Aung Ko Ko
Publication Years
2022
DOI
Source Title
ISSN
2574-0962
EISSN
2574-0962
Volume5Issue:9
Abstract
Tin-based halide perovskites are promising room-temperature thermoelectric materials due to their ultralow thermal conductivity and propensity for doping. However, poor phase stability and inferior electrical transport properties hinder their practical application. Herein, we found that organic cation formamidinium (FA) doping, which is not possible by high-temperature processing, could simultaneously enhance the stability and electrical conductivity of CsSnI3 films through a simple solution process. The carrier concentration of 3 × 1019 cm-3 was obtained in FA-doped films, which leads to an 8× enhancement in electrical conductivity to 26.5 S cm-1 but maintains a Seebeck coefficient as high as 131 μV K-1, resulting in a power factor of 45.53 μW m-1 K-2. A further theoretical calculation shows that the enhanced carrier concentration originates from the lowered transition energy of tin vacancies in the doped films. More importantly, remarkable phase stability is achieved under an ambient atmosphere, which stems from a sharply decreased free energy of the B-γphase compared to the Y phase by FA doping. This work suggests that organic cation doping by facile solution processing is an avenue for the simultaneous improvement of the thermoelectric power factor and phase stability of tin-based halide perovskite. It is applicable for flexible and wearable thermoelectric generators to harvest energy from low-grade heat sources.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
[62150610496] ; [2021KTSCX107] ; [2020A1515010916] ; [2021M701551]
WOS Research Area
Chemistry ; Energy & Fuels ; Materials Science
WOS Subject
Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000862399100001
Publisher
Scopus EID
2-s2.0-85138828890
Data Source
Scopus
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/402742
DepartmentDepartment of Electrical and Electronic Engineering
Affiliation
1.Department of Electrical and Electronic Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,1088 Xueyuan Avenue, Guangdong,518055,China
2.Department of Physics,Jinan University,Guangzhou,601 West Huangpu Avenue, Guangdong,510632,China
3.Key Laboratory of Flexible Electronics (KLOFE),Institute of Advanced Materials (IAM),Nanjing Tech University (Nanjing Tech),Nanjing,30 Puzhu Road (S), Jiangsu,211816,China
4.Department of Materials Science and Technology,National University of Singapore,Singapore,21 Lower Kent Ridge Road,119077,Singapore
First Author AffilicationDepartment of Electrical and Electronic Engineering
Corresponding Author AffilicationDepartment of Electrical and Electronic Engineering
First Author's First AffilicationDepartment of Electrical and Electronic Engineering
Recommended Citation
GB/T 7714
Wang,Teng,Xu,Xin,Li,Wenhui,et al. Simultaneous Enhancement of Thermoelectric Power Factor and Phase Stability of Tin-Based Perovskites by Organic Cation Doping[J]. ACS Applied Energy Materials,2022,5(9).
APA
Wang,Teng.,Xu,Xin.,Li,Wenhui.,Li,Yuheng.,Liu,Qian.,...&Kyaw,Aung Ko Ko.(2022).Simultaneous Enhancement of Thermoelectric Power Factor and Phase Stability of Tin-Based Perovskites by Organic Cation Doping.ACS Applied Energy Materials,5(9).
MLA
Wang,Teng,et al."Simultaneous Enhancement of Thermoelectric Power Factor and Phase Stability of Tin-Based Perovskites by Organic Cation Doping".ACS Applied Energy Materials 5.9(2022).
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