Thermal diffusivities of functionalized pentacene semiconductors

H. Zhang, Y. Yao, Marcia M. Payne, J. E. Anthony, J. W. Brill

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We have measured the interlayer and in-plane (needle axis) thermal diffusivity of 6,13-bis(triisopropylsilylethynyl) pentacene. The needle axis value is comparable to the phonon thermal diffusivities of quasi-one dimensional organic metals with excellent π-orbital overlap, and its value suggests that a significant fraction of heat is carried by optical phonons. Furthermore, the interlayer (c-axis) thermal diffusivity is at least an order of magnitude larger, and this unusual anisotropy implies very strong dispersion of optical modes in the interlayer direction, presumably due to interactions between the silyl-containing side groups. Similar values for both in-plane and interlayer diffusivities have been observed for several other functionalized pentacene semiconductors with related structures.

Original languageEnglish
Article number073302
JournalApplied Physics Letters
Issue number7
StatePublished - Aug 18 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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