no code implementations • 5 Mar 2021 • Tanvi Upreti, Yuming Wang, Huotian Zhang, Dorothea Scheunemann, Feng Gao, Martijn Kemerink
Charge transport in disordered organic semiconductors occurs by hopping of charge carriers between localized sites that are randomly distributed in a strongly energy dependent density of states.
Materials Science
no code implementations • 5 Mar 2021 • Viktoriia Untilova, Jonna Hynynen, Anna I. Hofmann, Dorothea Scheunemann, Yadong Zhang, Stephen Barlow, Martijn Kemerink, Seth R. Marder, Laure Biniek, Christian Müller, Martin Brinkmann
Here we report a record thermoelectric power factor of up to 160 $\mu$ W m-1 K-2 for the conjugated polymer poly(3-hexylthiophene) (P3HT).
Applied Physics Materials Science
no code implementations • 5 Mar 2021 • Dorothea Scheunemann, Vishnu Vijayakumar, Huiyan Zeng, Pablo Durand, Nicolas Leclerc, Martin Brinkmann, Martijn Kemerink
Highly oriented polymer films can show considerable anisotropy in the thermoelectric properties leading to power factors beyond those predicted by the widely obeyed power law linking the thermopower $S$ and the electrical conductivity $\sigma$ as $S\propto\sigma^{-1/4}$.
Materials Science
no code implementations • 5 Mar 2021 • Dorothea Scheunemann, Martijn Kemerink
However, in an optimized thermoelectric material, the electronic component can dominate the thermal conductivity in which case the figure of merit $ZT$ becomes a function of thermopower and Lorentz factor only.
Materials Science
