Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4812234
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Funding
- National Science Foundation [CBET-1134311]
- Army Research Office
- NASA
- NSF I/UCRC program
- University of Virginia Energy Initiative
- Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [823780] Funding Source: National Science Foundation
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We report on the thermal conductivities of poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate), [6,6]-phenyl C-61-butyric acid methyl ester (PCBM), poly(3-hexylthiophene-2,5-diyl) (P3HT), and P3HT:PCBM blend thin films as measured by time domain thermoreflectance. Thermal conductivities vary from 0.031 +/- 0.005 to 0.227 +/- 0.014 W m(-1) K-1 near room temperature and exhibit minimal temperature dependence across the range from 319 to 396 K. Thermal conductivities of blend films follow a rule of mixtures, and no percolation threshold is found. Thermal annealing of blend films has a variable effect on thermal conductivity. Finally, the thermal conductivities of P3HT films do not vary with changes in film thickness from 77 to 200 nm. (C) 2013 AIP Publishing LLC.
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