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 J. 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 J. Smith
, Yong-Hang Zhang
, Jacek K. Furdyna
, Chris Dames
, Wladyslaw Walukiewicz
, Junqiao Wu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

110 Citations (Scopus)

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
Pages (from-to)	3681-3686
Journal	Advanced Materials
Volume	27
Issue number	24
Online published	12 May 2015
DOIs	https://doi.org/10.1002/adma.201501350
Publication status	Published - 24 Jun 2015
Externally published	Yes

Research Keywords

Bi2Te3
defect engineering
native point defects
particle irradiation
thermoelectric properties

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10.1002/adma.201501350

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Cite this

@article{8b099ca7c64040c495041cb4d70a4d8f,

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 = "Bi2Te3, 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 Smith, \{David J.\} and Yong-Hang Zhang and Furdyna, \{Jacek K.\} and Chris Dames and Wladyslaw Walukiewicz and Junqiao Wu",

year = "2015",

month = jun,

day = "24",

doi = "10.1002/adma.201501350",

language = "English",

volume = "27",

pages = "3681--3686",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "Wiley-Blackwell",

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TY - JOUR

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 J.

AU - Zhang, Yong-Hang

AU - Furdyna, Jacek K.

AU - Dames, Chris

AU - Walukiewicz, Wladyslaw

AU - Wu, Junqiao

PY - 2015/6/24

Y1 - 2015/6/24

N2 - 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.

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.

KW - Bi2Te3

KW - defect engineering

KW - native point defects

KW - particle irradiation

KW - thermoelectric properties

UR - https://www.scopus.com/pages/publications/85027927193

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85027927193&origin=recordpage

U2 - 10.1002/adma.201501350

DO - 10.1002/adma.201501350

M3 - RGC 21 - Publication in refereed journal

SN - 0935-9648

VL - 27

SP - 3681

EP - 3686

JO - Advanced Materials

JF - Advanced Materials

IS - 24

ER -