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Preparation of (TiTe2)x(Sb2Te3)y(TiTe2)3(Bi2Te3)z Superlattices using the Modulated Elemental Reactants (MER) Technique

Published online by Cambridge University Press:  01 February 2011

Clay Mortensen ,
Ben Matelich ,
Benjamin Schmid ,
Raimar Rostek  and
David C. Johnson
Clay Mortensen
Affiliation:
[email protected], University of Oregon, 1253 University of Oregon, Eugene, OR, 97403, United States
Ben Matelich
Affiliation:
[email protected], Carroll College, Department of Natural Sciences, United States
Benjamin Schmid
Affiliation:
[email protected], University of Oregon, Chemistry, United States
Raimar Rostek
Affiliation:
[email protected], Fraunhofer Institut Physikalische Messtechnik, Germany
David C. Johnson
Affiliation:
[email protected], University of Oregon, Chemistry, United States
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Abstract

Difficulty in preparing (Bi2Te3)x(Sb2Te3)y superlattices due to interdiffusion of Sb and Bi led to the study of interduffusion barriers. TiTe2 has been explored as an interdiffusion barrier to minimize the interdiffusion of Sb and Bi, as TiTe2 is not soluble in either Bi2Te3 or Sb2Te3. Preparation of (TiTe2)3(Sb2Te3)y(TiTe2)3(Bi2Te3)z superlattices has been achieved with varying x, y and z. The formation of the superlattices was studied as a function of annealing temperature and time. TOF-SIMS depth profiles were used to study the extent of interdiffusion in the samples. Unit cell control was achieved allowing for the preparation of an array of superlattices with varying periods with very good reproducibility.

Keywords

nanostructurethermoelectricityx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 886: Symposium F – Materials and Technologies fore Direct Thermal-to-Electric Energy Conversion , 2005 , 0886-F03-14
Copyright
Copyright © Materials Research Society 2006

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References

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