Contributions to composite conductivity and Seebeck coefficient in commercial Bi₂Te₃—Conjugated polymer composites
Loading...
Links to Files
Author/Creator ORCID
Date
2019-03-28
Type of Work
Department
Program
Citation of Original Publication
Jiyuan Huang, Hui Li, Evan Kirksey, et.al, Contributions to composite conductivity and Seebeck coefficient in commercial Bi₂Te₃—Conjugated polymer composites, Journal of Applied Physics,125, 125502 (2019); https://doi.org/10.1063/1.5089872
Rights
This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Jiyuan Huang, Hui Li, Evan Kirksey, et.al, Contributions to composite conductivity and Seebeck coefficient in commercial Bi₂Te₃—Conjugated polymer composites, Journal of Applied Physics,125, 125502 (2019); https://doi.org/10.1063/1.5089872 and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5089872.
Access to this item will begin on March 28, 2020
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Jiyuan Huang, Hui Li, Evan Kirksey, et.al, Contributions to composite conductivity and Seebeck coefficient in commercial Bi₂Te₃—Conjugated polymer composites, Journal of Applied Physics,125, 125502 (2019); https://doi.org/10.1063/1.5089872 and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5089872.
Access to this item will begin on March 28, 2020
Subjects
Abstract
We demonstrated the use of as-received conjugated polymer P3HT [poly (3-hexylthiophene-2,5 diyl)] doped with F4TCNQ (2,3,5,6-
tetrafluoro-7,7,8,8-tetracyanoquinodimethane) as a matrix for forming a composite with as-received, commercially available p-type Bi2Te3
powder. The optimized formulation exhibits a power factor of up to 5:3 μWK⁻² m⁻¹, about nine times higher than the highest power
factor that we achieved from mixtures of only P3HT and F4TCNQ. Bi2Te3 was responsible for increases in both the Seebeck coefficient and
the electrical conductivity. P3HT, with a higher hole mobility, was superior to PQT-12 [poly(bisdodecylquaterthiophene)], and F4TCNQ
was at least as good as FeCl3, for matrix and dopant, respectively, for this purpose. The power factor obtained is about 40% of that reportedly
obtained from synthesized Bi2Te3 nanowires in FeCl3-doped P3HT. We calculated the expected contributions of the bulk Bi2Te3 to the
composite conductivity and then examined the resistance caused by interfaces on four different size distributions of Bi2Te3 particles, as well
as a solid macroscopic ingot. A nonlinear I–V relationship was found for the doped P3HT-ingot bilayer. While our doped conjugated
polymer system made only from commercial-grade components was shown to support the extraction of thermoelectric performance by a
commonly used inorganic semiconductor, our results also suggest that an advantage of the smallest Bi2Te3 domains, including nanowires,
may arise from their having less interfacial resistance than larger Bi2Te3 particles and pieces.