Ultrafast-laser modification of thermoelectric Sb2Te3 thin films

Yuwei Li; Vladimir A. Stoica; Lynn Endicott; Guoyu Wang; Huarui Sun; Kevin P. Pipe; Ctirad Uher; Roy Clarke

doi:10.1557/opl.2012.1370

Ultrafast-laser modification of thermoelectric Sb₂Te₃ thin films

Yuwei Li, Vladimir A. Stoica, Lynn Endicott, Guoyu Wang, Huarui Sun, Kevin P. Pipe, Ctirad Uher, Roy Clarke

Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We have modified Sb₂Te₃ thin film thermoelectric materials by scanning a femtosecond laser across the film surface to create track-like nanostructures. These nanotracks have widths of 50-80 nm and a periodicity of ∼ 130 nm. We show that the nanotrack morphology is highly dependent on laser fluence and scan speed. Moreover, we performed transient thermoreflectance measurements on a laser-irradiated film and found a thermal conductivity reduction of 4.5% in the nanostructured regions compared to that of the unmodified regions. These results suggest the potential use of femtosecond pulsed lasers to create nanostructured thermoelectric materials with improved performance.

Original language	English (US)
Title of host publication	Nanoscale Thermoelectrics 2012 - Materials and Transport Phenomena
Pages	19-24
Number of pages	6
DOIs	https://doi.org/10.1557/opl.2012.1370
State	Published - 2012
Event	2012 MRS Spring Meeting - San Francisco, CA, United States Duration: Apr 9 2012 → Apr 13 2012

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1456
ISSN (Print)	0272-9172

Other

Other	2012 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	4/9/12 → 4/13/12

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/opl.2012.1370

Cite this

@inproceedings{e17e8533c8db44fabba93915e23064fe,

title = "Ultrafast-laser modification of thermoelectric Sb2Te3 thin films",

abstract = "We have modified Sb2Te3 thin film thermoelectric materials by scanning a femtosecond laser across the film surface to create track-like nanostructures. These nanotracks have widths of 50-80 nm and a periodicity of ∼ 130 nm. We show that the nanotrack morphology is highly dependent on laser fluence and scan speed. Moreover, we performed transient thermoreflectance measurements on a laser-irradiated film and found a thermal conductivity reduction of 4.5% in the nanostructured regions compared to that of the unmodified regions. These results suggest the potential use of femtosecond pulsed lasers to create nanostructured thermoelectric materials with improved performance.",

author = "Yuwei Li and Stoica, {Vladimir A.} and Lynn Endicott and Guoyu Wang and Huarui Sun and Pipe, {Kevin P.} and Ctirad Uher and Roy Clarke",

note = "Funding Information: This material is based on work supported as part of the Center for Solar and Thermal Energy Conversion, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-SC00000957.; 2012 MRS Spring Meeting ; Conference date: 09-04-2012 Through 13-04-2012",

year = "2012",

doi = "10.1557/opl.2012.1370",

language = "English (US)",

isbn = "9781627482523",

series = "Materials Research Society Symposium Proceedings",

pages = "19--24",

booktitle = "Nanoscale Thermoelectrics 2012 - Materials and Transport Phenomena",

}

Li, Y, Stoica, VA, Endicott, L, Wang, G, Sun, H, Pipe, KP, Uher, C & Clarke, R 2012, Ultrafast-laser modification of thermoelectric Sb₂Te₃ thin films. in Nanoscale Thermoelectrics 2012 - Materials and Transport Phenomena. Materials Research Society Symposium Proceedings, vol. 1456, pp. 19-24, 2012 MRS Spring Meeting, San Francisco, CA, United States, 4/9/12. https://doi.org/10.1557/opl.2012.1370

TY - GEN

T1 - Ultrafast-laser modification of thermoelectric Sb2Te3 thin films

AU - Li, Yuwei

AU - Stoica, Vladimir A.

AU - Endicott, Lynn

AU - Wang, Guoyu

AU - Sun, Huarui

AU - Pipe, Kevin P.

AU - Uher, Ctirad

AU - Clarke, Roy

N1 - Funding Information: This material is based on work supported as part of the Center for Solar and Thermal Energy Conversion, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-SC00000957.

PY - 2012

Y1 - 2012

N2 - We have modified Sb2Te3 thin film thermoelectric materials by scanning a femtosecond laser across the film surface to create track-like nanostructures. These nanotracks have widths of 50-80 nm and a periodicity of ∼ 130 nm. We show that the nanotrack morphology is highly dependent on laser fluence and scan speed. Moreover, we performed transient thermoreflectance measurements on a laser-irradiated film and found a thermal conductivity reduction of 4.5% in the nanostructured regions compared to that of the unmodified regions. These results suggest the potential use of femtosecond pulsed lasers to create nanostructured thermoelectric materials with improved performance.

AB - We have modified Sb2Te3 thin film thermoelectric materials by scanning a femtosecond laser across the film surface to create track-like nanostructures. These nanotracks have widths of 50-80 nm and a periodicity of ∼ 130 nm. We show that the nanotrack morphology is highly dependent on laser fluence and scan speed. Moreover, we performed transient thermoreflectance measurements on a laser-irradiated film and found a thermal conductivity reduction of 4.5% in the nanostructured regions compared to that of the unmodified regions. These results suggest the potential use of femtosecond pulsed lasers to create nanostructured thermoelectric materials with improved performance.

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U2 - 10.1557/opl.2012.1370

DO - 10.1557/opl.2012.1370

M3 - Conference contribution

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T3 - Materials Research Society Symposium Proceedings

SP - 19

EP - 24

BT - Nanoscale Thermoelectrics 2012 - Materials and Transport Phenomena

T2 - 2012 MRS Spring Meeting

Y2 - 9 April 2012 through 13 April 2012

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