Effects of annealing electrodeposited bismuth telluride films

N. G. Stoltz, G. J. Snyder

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

Thermoelectric thin films exhibit different qualities when compared with bulk materials. The goal however is to achieve thermoelectric properties of bulk materials from electrodeposited thin films. Thin films are produced by electrochemical deposition at room temperature. In order to optimize thermoelectric figure of merit proper carrier concentration must be obtained. The carrier concentration can be observed through resistivity measurements of thin film Bi2Te3 n-type depositions on thin Chromium-Gold substrates. See beck coefficient measurements are performed on Bi2Te3 n- Type thin films deposited on Molybdenum foil. Annealing samples in the presence of Hydrogen Argon forming gas increases thermo power and resistivity consistent with a decrease in carrier concentration. Annealing between 200 and 500 Celsius for 1 to 20 hours was tested. This produces films with resistivity of 1 m? cm but a Seebeck coefficient of only -60 μV/K. Samples are suspected of remaining too heavily doped even after annealing. These results suggest there are defects in thin films that cannot be removed by annealing alone.

Original languageEnglish (US)
Title of host publicationProceedings ICT 2002
Subtitle of host publication21st International Conference on Thermoelectrics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages28-30
Number of pages3
ISBN (Electronic)0780376838
DOIs
StatePublished - Jan 1 2002
Event21st International Conference on Thermoelectrics, ICT 2002 - Long Beach, United States
Duration: Aug 25 2002Aug 29 2002

Publication series

NameInternational Conference on Thermoelectrics, ICT, Proceedings
Volume2002-January

Other

Other21st International Conference on Thermoelectrics, ICT 2002
CountryUnited States
CityLong Beach
Period8/25/028/29/02

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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