Journal article
Strong enhancement of room-temperature thermoelectric properties of Cu-doped Bi2Te2.7Se0.3
Applied physics letters, Vol.120(4), 043903
01/24/2022
DOI: 10.1063/5.0077057
Abstract
We investigate thermoelectric properties of Cu-doped Bi2Te2.7Se0.3 fabricated using a simple doping process and spark plasma sintering. Through precise control of Cu doping, it is found that Cu atoms preferentially occupied Bi sites and then intercalated into the van der Waals gap with an increasing Cu content. Electrical transport properties of Cu-doped samples were systemically controlled using this mechanism. At the same time, thermal conductivities of the Cu-doped samples were reduced by the enhancement of point defect phonon scattering due to the Cu atoms. Compared to that of pristine samples, the dimensionless thermoelectric figure of merit ( "ZT ") of 0.98 at 323 K for the Cu-doped sample was increased by more than 92% owing to these synergetic effects. Furthermore, the shift of maximum ZT to room temperature provides advantages for enlarging the applications of thermoelectric effects at room temperature.
Details
- Title: Subtitle
- Strong enhancement of room-temperature thermoelectric properties of Cu-doped Bi2Te2.7Se0.3
- Creators
- Gwansik Kim - Yonsei UniversityKyungmi Lee - Yonsei UniversityHyunjun Shin - Yonsei UniversityJeongmin Kim - Daegu Gyeongbuk Institute of Science and TechnologyJoonyeon Chang - Yonsei UniversityJong Wook Roh - Kyungpook National UniversityWooyoung Lee - Yonsei UniversityKyung Mi Lee - Nursing
- Resource Type
- Journal article
- Publication Details
- Applied physics letters, Vol.120(4), 043903
- DOI
- 10.1063/5.0077057
- ISSN
- 0003-6951
- eISSN
- 1077-3118
- Publisher
- AIP Publishing
- Number of pages
- 5
- Grant note
- 2Z06430-20-P069 / Yonsei-KIST Institutional Program NRF-2018R1D1A1A02085389; NRF-2019R1A6A1A11055660; NRF-2021R1A5A8033165 / National Research Foundation of Korea (NRF) - Korea government (MSIT); National Research Foundation of Korea; Ministry of Science, ICT & Future Planning, Republic of Korea; Ministry of Science & ICT (MSIT), Republic of Korea 20013621 / Ministry of Trade, Industry, and Energy (MOTIE, Korea); Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea
- Language
- English
- Date published
- 01/24/2022
- Academic Unit
- Nursing
- Record Identifier
- 9985219306602771
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