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arXiv · 1607.01712

Thermal Resistances of Thin-Films of Small Molecule Organic Semiconductors

Y. Yao·Maryam Shahi·Marcia M. Payne·J. E. Anthony·J. W. Brill
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Abstract

We have measured the thermal resistances of thin films of the small molecule organic semiconductors bis(triisopropylsilylethynyl) pentacene (TIPS-pn), bis(triethylsilylethynyl) anthradithiophene (TES-ADT) and difluoro bis(triethylsilylethynyl) anthradithiophene (diF-TES-ADT). For each material, several films of different thicknesses have been measured to separate the effects of intrinsic thermal conductivity from interface thermal resistance. For non-crystalline films of all three materials, with thicknesses ranging from < 100 nm to > 4 microns, the thermal conductivities are similar to that of polymers and over an order of magnitude smaller than that of the crystals, reflecting the large reduction in phonon mean-free path in the films. Thin (< 205 nm) crystalline films of TES-ADT, prepared by vapor-annealing spin-cast films, have also been measured, but for these the thermal resistances are dominated by interface scattering.

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Y. Yao, Maryam Shahi, Marcia M. Payne, J. E. Anthony, J. W. Brill. 2016-07-06. Thermal Resistances of Thin-Films of Small Molecule Organic Semiconductors. https://arxiv.org/abs/1607.01712

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