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Issue 2, 2016
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Origins of ultralow thermal conductivity in bulk [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)

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Abstract

Bulk PCBM has exceptionally low thermal conductivity, 0.07 W m−1 K−1 at room temperature. We show that its ultralow thermal conductivity is an intrinsic property. Based on results for thermal conductivity and heat capacity measurements down to <2 K, along with Raman spectroscopy and dilatometry, a new model for minimum thermal conductivity was developed. In the model the thermal energy is transferred between entities of phonons oscillating in a range of frequencies, and limited by the atomic density and the phonon mean speed. The model accurately represents the low thermal conductivity for both PCBM and C60/C70.

Graphical abstract: Origins of ultralow thermal conductivity in bulk [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)

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The article was received on 28 Oct 2015, accepted on 01 Dec 2015 and first published on 02 Dec 2015


Article type: Paper
DOI: 10.1039/C5CP06575E
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 1185-1190
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    Origins of ultralow thermal conductivity in bulk [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)

    J. Pöhls, M. B. Johnson and M. A. White, Phys. Chem. Chem. Phys., 2016, 18, 1185
    DOI: 10.1039/C5CP06575E

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