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- Title
Design Rules for Polymer Blends with High Thermoelectric Performance.
- Authors
Zapata‐Arteaga, Osnat; Marina, Sara; Zuo, Guangzheng; Xu, Kai; Dörling, Bernhard; Pérez, Luis Alberto; Reparaz, Juan Sebastián; Martín, Jaime; Kemerink, Martijn; Campoy‐Quiles, Mariano
- Abstract
A combinatorial study of the effect of in‐mixing of various guests on the thermoelectric properties of the host workhorse polymer poly[2,5‐bis(3‐tetradecylthiophen‐2‐yl)thieno[3,2‐b]thiophene] (PBTTT) is presented. Specifically, the composition and thickness for doped films of PBTTT blended with different polymers are varied. Some blends at guest weight fractions around 10–15% exhibit up to a fivefold increase in power factor compared to the reference material, leading to zT values around 0.1. Spectroscopic analysis of the charge‐transfer species, structural characterization using grazing‐incidence wide‐angle X‐ray scattering, differential scanning calorimetry, Raman, and atomic force microscopy, and Monte Carlo simulations are employed to determine that the key to improved performance is for the guest to promote long‐range electrical connectivity and low disorder, together with similar highest occupied molecular orbital levels for both materials in order to ensure electronic connectivity are combined.
- Subjects
POLYMER blends; FRONTIER orbitals; ATOMIC force microscopy; MONTE Carlo method; THERMOELECTRIC materials; DIFFERENTIAL scanning calorimetry
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 19, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202104076