Simultaneous Enhancement of Electrical Conductivity and Thermopower of Bi2Te3 by Multifunctionality of Native Defects

Joonki Suh; Kin Man Yu; Deyi Fu; Xinyu Liu; Fan Yang; Jin Fan; David Smith; Yong-Hang Zhang; Jacek K. Furdyna; Chris Dames; Wladyslaw Walukiewicz; Junqiao Wu

doi:10.1002/adma.201501350

Simultaneous Enhancement of Electrical Conductivity and Thermopower of Bi₂Te₃ by Multifunctionality of Native Defects

Joonki Suh, Kin Man Yu, Deyi Fu, Xinyu Liu, Fan Yang, Jin Fan, David Smith, Yong-Hang Zhang, Jacek K. Furdyna, Chris Dames, Wladyslaw Walukiewicz, Junqiao Wu

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

Simultaneous increases in electrical conductivity (up to 200%) and thermopower (up to 70%) are demonstrated by introducing native defects in Bi₂Te₃ films, leading to a high power factor of 3.4 × 10^-3 W m^-1 K^-2. The maximum enhancement of the power factor occurs when the native defects act beneficially both as electron donors and energy filters to mobile electrons. They also act as effective phonon scatterers.

Original language	English (US)
Pages (from-to)	3681-3686
Number of pages	6
Journal	Advanced Materials
Volume	27
Issue number	24
DOIs	https://doi.org/10.1002/adma.201501350
State	Published - Jun 1 2015

Keywords

BiTe
defect engineering
native point defects
particle irradiation
thermoelectric properties

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/adma.201501350

Cite this

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title = "Simultaneous Enhancement of Electrical Conductivity and Thermopower of Bi2Te3 by Multifunctionality of Native Defects",

abstract = "Simultaneous increases in electrical conductivity (up to 200%) and thermopower (up to 70%) are demonstrated by introducing native defects in Bi2Te3 films, leading to a high power factor of 3.4 × 10-3 W m-1 K-2. The maximum enhancement of the power factor occurs when the native defects act beneficially both as electron donors and energy filters to mobile electrons. They also act as effective phonon scatterers.",

keywords = "BiTe, defect engineering, native point defects, particle irradiation, thermoelectric properties",

author = "Joonki Suh and Yu, {Kin Man} and Deyi Fu and Xinyu Liu and Fan Yang and Jin Fan and David Smith and Yong-Hang Zhang and Furdyna, {Jacek K.} and Chris Dames and Wladyslaw Walukiewicz and Junqiao Wu",

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T1 - Simultaneous Enhancement of Electrical Conductivity and Thermopower of Bi2Te3 by Multifunctionality of Native Defects

AU - Suh, Joonki

AU - Yu, Kin Man

AU - Fu, Deyi

AU - Liu, Xinyu

AU - Yang, Fan

AU - Fan, Jin

AU - Smith, David

AU - Zhang, Yong-Hang

AU - Furdyna, Jacek K.

AU - Dames, Chris

AU - Walukiewicz, Wladyslaw

AU - Wu, Junqiao

PY - 2015/6/1

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AB - Simultaneous increases in electrical conductivity (up to 200%) and thermopower (up to 70%) are demonstrated by introducing native defects in Bi2Te3 films, leading to a high power factor of 3.4 × 10-3 W m-1 K-2. The maximum enhancement of the power factor occurs when the native defects act beneficially both as electron donors and energy filters to mobile electrons. They also act as effective phonon scatterers.

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KW - defect engineering

KW - native point defects

KW - particle irradiation

KW - thermoelectric properties

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