Raman study on pentacene: C60 bulk heterojunction films

Yasuhiro Iwasawa, Tomoya Sasaki, Takanori Shibata, Yukio Furukawa

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    2 Citations (Scopus)

    Abstract

    We measured 785 nm excited Raman and infrared spectra of pentacene-d14. The observed spectra were assigned on the basis of the Raman and infrared spectra calculated by the density functional theory (DFT) method at the B3LYP/6-311 + G∗∗level. We measured 785 nm excited Raman spectrum of a pentacne-d14:C60 bulk heterojunction film. The spectrum was assigned on the basis of the wavenumber shifts upon deuteration of pentacene. The assignments of the 1462 and 493 cm-1 Ag bands of C60 were confirmed. The 511, 453, and 256 cm-1 bands, which were observed only in pentacene:C60 bulk heterojunction films, did not show large deuteration shifts. This result indicates that the 511, 453, and 256 cm-1 bands are attributed to activation of the silent modes of C60 due to symmetry lowering.

    Original languageEnglish
    Pages (from-to)133-138
    Number of pages6
    JournalVibrational Spectroscopy
    Volume84
    DOIs
    Publication statusPublished - 2016 May 1

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    Keywords

    • Bulk heterojunction
    • C
    • Organic photovoltaic cells
    • Pentacene-d
    • Raman spectroscopy

    ASJC Scopus subject areas

    • Spectroscopy

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