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Enhanced Thermoelectric Power Factor in Carrier-Type-Controlled Platinum Diselenide Nanosheets by Molecular Charge-Transfer Doping

Title
Enhanced Thermoelectric Power Factor in Carrier-Type-Controlled Platinum Diselenide Nanosheets by Molecular Charge-Transfer Doping
Author(s)
Youn SeonhyeKim, JeongminMoon HongjaeKim Jae-KeunJang JuntaeChang JoonyeonLee TakheeKang KeehoonLee Wooyoung
Issued Date
2022-06
Citation
Small, v.18, no.23
Type
Article
Author Keywords
electrical conductivitymolecular charge-transfer dopingnanosheetsplatinum diselenideSeebeck coefficientthermoelectric power factor
Keywords
THERMAL-CONDUCTIVITYMOS2PERFORMANCEVIOLOGEN
ISSN
1613-6810
Abstract
2D transition metal dichalcogenides (TMDCs) have revealed great promise for realizing electronics at the nanoscale. Despite significant interests that have emerged for their thermoelectric applications due to their predicted high thermoelectric figure of merit, suitable doping methods to improve and optimize the thermoelectric power factor of TMDCs have not been studied extensively. In this respect, molecular charge-transfer doping is utilized effectively in TMDC-based nanoelectronic devices due to its facile and controllable nature owing to a diverse range of molecular designs available for modulating the degree of charge transfer. In this study, the power of molecular charge-transfer doping is demonstrated in controlling the carrier-type (n- and p-type) and thermoelectric power factor in platinum diselenide (PtSe2) nanosheets. This, combined with the tunability in the band overlap by changing the thickness of the nanosheets, allows a significant increase in the thermoelectric power factor of the n- and p-doped PtSe2 nanosheets to values as high as 160 and 250 µW mK−2, respectively. The methodology employed in this study provides a simple and effective route for the molecular doping of TMDCs that can be used for the design and development of highly efficient thermoelectric energy conversion systems. © 2022 Wiley-VCH GmbH.
URI
http://hdl.handle.net/20.500.11750/16486
DOI
10.1002/smll.202200818
Publisher
Wiley-VCH Verlag
Related Researcher
  • 김정민 Kim, Jeongmin
  • Research Interests Transport Measurement in Low-dimensional Materials; 저차원소재 수송물성측정; Rare-earth Magnets for Electric Vehicle Traction Motors; 전기차 구동모터용 희토자석; Thermoelectric Materials; 열전소재
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Division of Nanotechnology 1. Journal Articles

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