Tracing charge transfer states in polymer:fullerene bulk-heterojunctions.

Marianna Manca, Claudia Piliego, Ergang Wang, Mats R. Andersson, Andrea Mura, Maria Loi

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Charge transfer state emission in organic bulk-heterojunctions has been demonstrated to be an important loss mechanism for this reason a better understanding of the nature and origin of the charge transfer state is fundamental for the improvement of organic solar cells. Here, the relationship between photophysical and morphological features of a prototypical organic bulk-heterojunction is investigated in blends with different donor-acceptor ratios. By correlating imaging with photoluminescence spectra measured in different areas of the blends, the charge transfer state emission is unambiguously assigned to microscopical regions in which the intermixing of the two organic semiconductors is higher.

    Original languageEnglish
    Pages (from-to)7321-7325
    Number of pages5
    JournalJournal of Materials Chemistry A
    Volume1
    Issue number25
    DOIs
    Publication statusPublished - 7 Jul 2013

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