Multidimensional nanoscopic approaches to new thermoelectric materials

Douglas S. Dudis; John B. Ferguson; Michael Check; Joel E. Schmidt; Evan R. Kemp; Thomas Robbins; Joseph A. Shumaker; Chenggang Chen; Harry A. Seibel II

doi:10.1117/12.852182

29 April 2010 Multidimensional nanoscopic approaches to new thermoelectric materials

Douglas S. Dudis, John B. Ferguson, Michael Check, Joel E. Schmidt, Evan R. Kemp, Thomas Robbins, Joseph A. Shumaker, Chenggang Chen, Harry A. Seibel II

Author Affiliations +

Proceedings Volume 7683, Energy Harvesting and Storage: Materials, Devices, and Applications; 76830S (2010) https://doi.org/10.1117/12.852182
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

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.

Citation Download Citation

Douglas S. Dudis, John B. Ferguson, Michael Check, Joel E. Schmidt, Evan R. Kemp, Thomas Robbins, Joseph A. Shumaker, Chenggang Chen, and Harry A. Seibel II "Multidimensional nanoscopic approaches to new thermoelectric materials", Proc. SPIE 7683, Energy Harvesting and Storage: Materials, Devices, and Applications, 76830S (29 April 2010); https://doi.org/10.1117/12.852182

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