Raman study of the interaction between regioregular poly(3-hexylthiophene) (P3HT) and transition-metal oxides MoO3, V2O5, and WO3 in polymer solar cells

Jun Yamamoto, Yukio Furukawa

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    We measured the Raman spectra of indium-tin oxide (ITO)/poly(3-hexylthiophene) (P3HT)/metal oxide (MoO3, V2O5, or WO3) samples as an anode buffer layer. The difference Raman spectrum between ITO/P3HT/MoO3 and ITO/P3HT was similar to that of positive polarons generated by FeCl3 doping, which indicated that positive polarons were formed upon MoO3 deposition. MoO3 functioned as an oxidizing dopant. Positive polarons were also formed upon V2O5 and WO3 deposition. The polaron electronic energy levels formed near the Fermi level of an ITO, Ag, or Au electrode are associated with an improvement of charge transport through the interface.

    Original languageEnglish
    Pages (from-to)267-270
    Number of pages4
    JournalChemical Physics Letters
    Volume644
    DOIs
    Publication statusPublished - 2016 Jan 16

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Physics and Astronomy(all)

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