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Proceedings Paper

Multidimensional nanoscopic approaches to new thermoelectric materials
Author(s): Douglas S. Dudis; John B. Ferguson; Michael Check; Joel E. Schmidt; Evan R. Kemp; Thomas Robbins; Joseph A. Shumaker; Chenggang Chen; Harry A. Seibel
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Paper Abstract

The advantages of thermoelectric energy conversion technologies are briefly summarized. Recent material advances are discussed, with the focus on one-dimensional (1-D) self-assembled molecular materials as building blocks for new thermoelectric materials. The preparation, doping, and thermal characterization of phthalocyanine based materials are presented. The thermal conductivity of the doped material is lower than the undoped material even though the electrical conductivity of the doped material is orders of magnitude higher than the undoped material. This is counter intuitive against the backdrop of the Wiedemann-Franz treatment of thermal conductivity in electrical conductors from which one would expect thermal and electrical conductivity to both increase with introduction of additional charge carriers. These unusual results can be understood as a competition between the generation of an increased number of charge carriers and enhanced phonon scattering resulting from the introduction of chemical dopants. The thermal conductivity of the undoped phthalocyanines has been found to be small and only modestly temperature dependent in the 50-300 C range, but it is larger than a previous, indirect measurement.

Paper Details

Date Published: 29 April 2010
PDF: 7 pages
Proc. SPIE 7683, Energy Harvesting and Storage: Materials, Devices, and Applications, 76830S (29 April 2010); doi: 10.1117/12.852182
Show Author Affiliations
Douglas S. Dudis, Air Force Research Lab. (United States)
John B. Ferguson, Air Force Research Lab. (United States)
Michael Check, Air Force Research Lab. (United States)
Joel E. Schmidt, Air Force Research Lab. (United States)
Evan R. Kemp, Air Force Research Lab. (United States)
Thomas Robbins, Air Force Research Lab. (United States)
Joseph A. Shumaker, Univ. of Dayton Research Institute (United States)
Chenggang Chen, Univ. of Dayton Research Institute (United States)
Harry A. Seibel, Universal Technology Corp. (United States)


Published in SPIE Proceedings Vol. 7683:
Energy Harvesting and Storage: Materials, Devices, and Applications
Nibir K. Dhar; Priyalal S. Wijewarnasuriya; Achyut Kumar Dutta, Editor(s)

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