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Copper telluride with manipulated carrier concentrations for high-performance solid-state thermoelectrics
- Authors
- Ju, Hyun; Park, Dabin; Kim, Minsu; Kim, Jooheon
- Issue Date
- Dec-2022
- Publisher
- Chinese Society of Metals
- Keywords
- Carrier concentration; Copper telluride; Graphene; Single parabolic band model; Thermoelectric
- Citation
- Journal of Materials Science and Technology, v.129, pp 190 - 195
- Pages
- 6
- Journal Title
- Journal of Materials Science and Technology
- Volume
- 129
- Start Page
- 190
- End Page
- 195
- ISSN
- 1005-0302
1941-1162
- Abstract
- This study proposed a strategy for effectively diminishing the carrier concentration in Cu2Te by introducing graphene sheets. Based on thermoelectric property measurements and single parabolic band modeling, the incorporated graphene effectively reduced the carrier concentration, not only enhancing the thermoelectric performance of the Cu2Te/graphene composite but also substantially improving its figure of merit up to ∼1.47 at 1000 K, which is 268% higher than that of pristine Cu2Te. This study gives an insight into the control of carrier concentration and thermoelectric properties in Cu2Te, and it could be extended to other copper chalcogenides for excellent thermoelectrics. © 2022
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