Enhancement of seebeck coefficient in Bi0.5Sb 1.5Te3 with high-density tellurium nanoinclusions

Sang Kim, Kyunghan Ahn, Dong Hee Yeon, Sungwoo Hwang, Hyun Sik Kim, Sang Mock Lee, Kyu Hyoung Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Bi0.5Sb1.5Te3 films with homogeneously dispersed ∼15nm Te nanoparticles were prepared by the alternate deposition of Bi0.5Sb1.5Te3 layers and Te nanoparticles. As the amount of Te nanoinclusions increased to 15 vol %, the Seebeck coefficient increased from 169 to 248 μV/K. The authors concluded that the high-density Te nanoinclusions result in a carrier energy filtering effect in Bi0.5Sb1.5Te3. Consequently, the thermoelectric power factor was enhanced by 30% despite a reduction in electrical conductivity. The improvement of the power factor implies the enhancement of the thermoelectric figure of merit ZT, providing the possibility of further ZT improvement by embedding Te nanoinclusions in Bi0.5Sb 1.5Te3 bulk materials.

Original languageEnglish
Article number091801
JournalApplied Physics Express
Volume4
Issue number9
DOIs
Publication statusPublished - 2011 Sep 1

Fingerprint

Seebeck coefficient
Tellurium
tellurium
Seebeck effect
Nanoparticles
nanoparticles
augmentation
Thermoelectric power
figure of merit
embedding
electrical resistivity
energy
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Kim, Sang ; Ahn, Kyunghan ; Yeon, Dong Hee ; Hwang, Sungwoo ; Kim, Hyun Sik ; Lee, Sang Mock ; Lee, Kyu Hyoung. / Enhancement of seebeck coefficient in Bi0.5Sb 1.5Te3 with high-density tellurium nanoinclusions. In: Applied Physics Express. 2011 ; Vol. 4, No. 9.
@article{30a6627db6a3416aac4a416ce7babc8d,
title = "Enhancement of seebeck coefficient in Bi0.5Sb 1.5Te3 with high-density tellurium nanoinclusions",
abstract = "Bi0.5Sb1.5Te3 films with homogeneously dispersed ∼15nm Te nanoparticles were prepared by the alternate deposition of Bi0.5Sb1.5Te3 layers and Te nanoparticles. As the amount of Te nanoinclusions increased to 15 vol {\%}, the Seebeck coefficient increased from 169 to 248 μV/K. The authors concluded that the high-density Te nanoinclusions result in a carrier energy filtering effect in Bi0.5Sb1.5Te3. Consequently, the thermoelectric power factor was enhanced by 30{\%} despite a reduction in electrical conductivity. The improvement of the power factor implies the enhancement of the thermoelectric figure of merit ZT, providing the possibility of further ZT improvement by embedding Te nanoinclusions in Bi0.5Sb 1.5Te3 bulk materials.",
author = "Sang Kim and Kyunghan Ahn and Yeon, {Dong Hee} and Sungwoo Hwang and Kim, {Hyun Sik} and Lee, {Sang Mock} and Lee, {Kyu Hyoung}",
year = "2011",
month = "9",
day = "1",
doi = "10.1143/APEX.4.091801",
language = "English",
volume = "4",
journal = "Applied Physics Express",
issn = "1882-0778",
publisher = "Japan Society of Applied Physics",
number = "9",

}

Enhancement of seebeck coefficient in Bi0.5Sb 1.5Te3 with high-density tellurium nanoinclusions. / Kim, Sang; Ahn, Kyunghan; Yeon, Dong Hee; Hwang, Sungwoo; Kim, Hyun Sik; Lee, Sang Mock; Lee, Kyu Hyoung.

In: Applied Physics Express, Vol. 4, No. 9, 091801, 01.09.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhancement of seebeck coefficient in Bi0.5Sb 1.5Te3 with high-density tellurium nanoinclusions

AU - Kim, Sang

AU - Ahn, Kyunghan

AU - Yeon, Dong Hee

AU - Hwang, Sungwoo

AU - Kim, Hyun Sik

AU - Lee, Sang Mock

AU - Lee, Kyu Hyoung

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Bi0.5Sb1.5Te3 films with homogeneously dispersed ∼15nm Te nanoparticles were prepared by the alternate deposition of Bi0.5Sb1.5Te3 layers and Te nanoparticles. As the amount of Te nanoinclusions increased to 15 vol %, the Seebeck coefficient increased from 169 to 248 μV/K. The authors concluded that the high-density Te nanoinclusions result in a carrier energy filtering effect in Bi0.5Sb1.5Te3. Consequently, the thermoelectric power factor was enhanced by 30% despite a reduction in electrical conductivity. The improvement of the power factor implies the enhancement of the thermoelectric figure of merit ZT, providing the possibility of further ZT improvement by embedding Te nanoinclusions in Bi0.5Sb 1.5Te3 bulk materials.

AB - Bi0.5Sb1.5Te3 films with homogeneously dispersed ∼15nm Te nanoparticles were prepared by the alternate deposition of Bi0.5Sb1.5Te3 layers and Te nanoparticles. As the amount of Te nanoinclusions increased to 15 vol %, the Seebeck coefficient increased from 169 to 248 μV/K. The authors concluded that the high-density Te nanoinclusions result in a carrier energy filtering effect in Bi0.5Sb1.5Te3. Consequently, the thermoelectric power factor was enhanced by 30% despite a reduction in electrical conductivity. The improvement of the power factor implies the enhancement of the thermoelectric figure of merit ZT, providing the possibility of further ZT improvement by embedding Te nanoinclusions in Bi0.5Sb 1.5Te3 bulk materials.

UR - http://www.scopus.com/inward/record.url?scp=80052580406&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052580406&partnerID=8YFLogxK

U2 - 10.1143/APEX.4.091801

DO - 10.1143/APEX.4.091801

M3 - Article

AN - SCOPUS:80052580406

VL - 4

JO - Applied Physics Express

JF - Applied Physics Express

SN - 1882-0778

IS - 9

M1 - 091801

ER -