Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films

doi:10.1063/1.4979785

Title: Correlating thermoelectric properties with microstructure in Bi _0.8 Sb _0.2 thin films

Abstract

The room temperature electronic transport properties of 100 nm-thick thermoelectric Bi_0.8Sb_0.2 films, sputter-deposited onto quartz substrates and post-annealed in an ex-situ furnace, systematically correlate with the overall microstructural quality, improving with increasing annealing temperature until close to the melting point for the alloy composition. Furthermore, the optimized films have high crystalline quality with ~99% of the grains oriented with the trigonal axis perpendicular to the substrate surface. Film resistivities and Seebeck coefficients are accurately measured by preventing deleterious surface oxide formation via a SiN capping layer and using Nd-doped Al for contacts. Our resulting values are similar to single crystals and significantly better than previous reports from films and polycrystalline bulk alloys.

Authors:

Siegal, M. P. ^[1]; Lima-Sharma, A. L. ^[1]; Sharma, P. A. ^[1];

^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Publication Date:: 2017-04-03

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1357018

Report Number(s):: SAND2017-0986J
Journal ID: ISSN 0003-6951; 650830

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Accepted Manuscript

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 110; Journal Issue: 14; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Siegal, M. P., Lima-Sharma, A. L., Sharma, P. A., and Rochford, C. Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films.  United States: N. p., 2017. 
        Web.  doi:10.1063/1.4979785.

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                    Siegal, M. P., Lima-Sharma, A. L., Sharma, P. A., & Rochford, C. Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films.  United States.  doi:10.1063/1.4979785.

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                    Siegal, M. P., Lima-Sharma, A. L., Sharma, P. A., and Rochford, C. Mon .  
        "Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films".  United States.  doi:10.1063/1.4979785.  https://www.osti.gov/servlets/purl/1357018.

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@article{osti_1357018,

  title        = {Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films},

  author       = {Siegal, M. P. and Lima-Sharma, A. L. and Sharma, P. A. and Rochford, C.},

  abstractNote = {The room temperature electronic transport properties of 100 nm-thick thermoelectric Bi0.8Sb0.2 films, sputter-deposited onto quartz substrates and post-annealed in an ex-situ furnace, systematically correlate with the overall microstructural quality, improving with increasing annealing temperature until close to the melting point for the alloy composition. Furthermore, the optimized films have high crystalline quality with ~99% of the grains oriented with the trigonal axis perpendicular to the substrate surface. Film resistivities and Seebeck coefficients are accurately measured by preventing deleterious surface oxide formation via a SiN capping layer and using Nd-doped Al for contacts. Our resulting values are similar to single crystals and significantly better than previous reports from films and polycrystalline bulk alloys.},

  doi          = {10.1063/1.4979785},

  journal      = {Applied Physics Letters},

  number       = 14,

  volume       = 110,

  place        = {United States},

  year         = {2017},

  month        = {4}

}

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Title: Correlating thermoelectric properties with microstructure in Bi 0.8 Sb 0.2 thin films

Abstract

Citation Formats

Topotactical reactions with ferrimagnetic oxides having hexagonal crystal structures—I journal, February 1959

Sb concentration dependent structural and resistive properties of polycrystalline Bi-Sb alloys journal, October 2012

Improving Bi 2 Te 3 -based thermoelectric nanowire microstructure via thermal processing journal, January 2014

Thermoelectric properties of Bi–Sb semiconducting alloys prepared by quenching and annealing journal, July 2004

Thermodynamic evaluation of the system bismuth-antimony journal, April 1992

Transport properties of Bi-RICH Bi-Sb alloys journal, January 1996

The crystal structure of arsenic at 4.2, 78 and 299°K journal, May 1969

Using galvanostatic electroforming of Bi 1– x Sb x nanowires to control composition, crystallinity, and orientation journal, December 2014

Transport properties of Bi1−xSbx alloy nanowires synthesized by pressure injection journal, July 2001

Recrystallized Arrays of Bismuth Nanowires with Trigonal Orientation journal, March 2014

Assembly and measurement of a hybrid nanowire-bulk thermoelectric device journal, December 2006

Thermoelectric Properties of Bismuth‐Antimony Alloys journal, March 1962

Effects of Y or Gd addition on the structures and resistivities of Al thin films journal, July 1996

Thermoelectric figure of merit of a one-dimensional conductor journal, June 1993

Making electrical contacts to nanowires with a thick oxide coating journal, September 2002

Transport properties of Bi 1 − x Sb x alloy thin films grown on CdTe ( 111 ) B journal, April 1999

Semiconducting behavior in antimony‐doped bismuth films journal, May 1981

The Semiconductor–Semimetal Transition in Bi1−xSbx Alloys withx ≧ 0.22 journal, July 1978

Thermoelectric and magnetotransport properties of Bi 1- x Sb x thin films and Bi/CdTe superlattices journal, January 1999

Controlling compositional homogeneity and crystalline orientation in Bi 0.8 Sb 0.2 thermoelectric thin films journal, December 2015

The crystal structure of Bi and of solid solutions of Pb, Sn, Sb and Te in Bi journal, September 1962

Effect of Nd on microstructure and mechanical properties of NiAl-based intermetallic alloy journal, February 2003

Galvanomagnetic properties of single-crystal bismuth-antimony thin films journal, March 1990

Mobilities and Concentrations of Charge Carriers in Polycrystalline Bi0.87Sb0.13 Films journal, November 1990

BiSb alloys for magneto-thermoelectric and thermomagnetic cooling journal, October 1972

Anomalously high thermoelectric figure of merit in Bi1−xSbx nanowires by carrier pocket alignment journal, July 2001

Title: Correlating thermoelectric properties with microstructure in Bi _0.8 Sb _0.2 thin films

Topotactical reactions with ferrimagnetic oxides having hexagonal crystal structures—I
journal, February 1959

Sb concentration dependent structural and resistive properties of polycrystalline Bi-Sb alloys
journal, October 2012

Improving Bi ₂ Te ₃ -based thermoelectric nanowire microstructure via thermal processing
journal, January 2014

Thermoelectric properties of Bi–Sb semiconducting alloys prepared by quenching and annealing
journal, July 2004

Thermodynamic evaluation of the system bismuth-antimony
journal, April 1992

Transport properties of Bi-RICH Bi-Sb alloys
journal, January 1996

The crystal structure of arsenic at 4.2, 78 and 299°K
journal, May 1969

Using galvanostatic electroforming of Bi _{1– x} Sb _x nanowires to control composition, crystallinity, and orientation
journal, December 2014

Transport properties of Bi1−xSbx alloy nanowires synthesized by pressure injection
journal, July 2001

Recrystallized Arrays of Bismuth Nanowires with Trigonal Orientation
journal, March 2014

Assembly and measurement of a hybrid nanowire-bulk thermoelectric device
journal, December 2006

Thermoelectric Properties of Bismuth‐Antimony Alloys
journal, March 1962

Effects of Y or Gd addition on the structures and resistivities of Al thin films
journal, July 1996

Thermoelectric figure of merit of a one-dimensional conductor
journal, June 1993

Making electrical contacts to nanowires with a thick oxide coating
journal, September 2002

Transport properties of ${Bi}_{1 - x} {Sb}_{x}$ alloy thin films grown on $CdTe (111) B$
journal, April 1999

Semiconducting behavior in antimony‐doped bismuth films
journal, May 1981

The Semiconductor–Semimetal Transition in Bi1−xSbx Alloys withx ≧ 0.22
journal, July 1978

Thermoelectric and magnetotransport properties of Bi _{1- x} Sb _x thin films and Bi/CdTe superlattices
journal, January 1999

Controlling compositional homogeneity and crystalline orientation in Bi _0.8 Sb _0.2 thermoelectric thin films
journal, December 2015

The crystal structure of Bi and of solid solutions of Pb, Sn, Sb and Te in Bi
journal, September 1962

Effect of Nd on microstructure and mechanical properties of NiAl-based intermetallic alloy
journal, February 2003

Galvanomagnetic properties of single-crystal bismuth-antimony thin films
journal, March 1990

Mobilities and Concentrations of Charge Carriers in Polycrystalline Bi0.87Sb0.13 Films
journal, November 1990

BiSb alloys for magneto-thermoelectric and thermomagnetic cooling
journal, October 1972

Anomalously high thermoelectric figure of merit in Bi1−xSbx nanowires by carrier pocket alignment
journal, July 2001