Solution processible nanoparticle thermoelectric materials

Ngoc Nguyen; George M. Williams Jr.; Thomas Allen; David Schut; David C. Johnson

doi:10.1117/12.887752

17 May 2011 Solution processible nanoparticle thermoelectric materials

Ngoc Nguyen, George M. Williams Jr., Thomas Allen, David Schut, David C. Johnson

Proceedings Volume 8035, Energy Harvesting and Storage: Materials, Devices, and Applications II; 803514 (2011) https://doi.org/10.1117/12.887752
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

The fabrication of stoichiometric (Bi_xSb_{1- x})₂Te₃ thermoelectric films comprised of nanostructured building blocks were fabricated using solution processing compatible methods. Nanostructured films of n-type Bi₂Te₃, (Bi_0.75Sb_0.25)₂Te₃, and (Bi_0.50Sb_0.50)₂Te₃ and p-type (Bi_0.25Sb_0.75)₂Te₃ and Sb₂Te₃ TE thermoelectric materials were fabricated using intercalated and exfoliated stoichiometric bulk materials. Fine control was exerted over the composition and reaction to maintain the purity and effectiveness of the nanostructured alloys composition of the materials as they were deposited, pressed, and annealed in a Te-rich ambient. A Seebeck coefficient was measured to be -235 μVK^-1 for the n-type Bi₂Te₃ films, and 262 μVK^-1 for the p-type (Bi_0.25S_0.75)₂Te₃ films. Although limited by high resistance, due to cracking of the films, ZT was estimated to be between 0.8 and 1.69 for the n-type films and an order of magnitude lower for the p-type films.

Citation Download Citation

Ngoc Nguyen, George M. Williams Jr., Thomas Allen, David Schut, and David C. Johnson "Solution processible nanoparticle thermoelectric materials", Proc. SPIE 8035, Energy Harvesting and Storage: Materials, Devices, and Applications II, 803514 (17 May 2011); https://doi.org/10.1117/12.887752

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