Fluorescence properties of hybridized thin films consisting of organic dye J-aggregates and titanium oxide nanoparticles

Takuya Yanagita, Tsunenobu Onodera, Rodrigo Sato, Yoshihiko Takeda, Hidetoshi Oikawa

    研究成果: Article査読

    抄録

    Aiming at a highly bright emitter, hybridized thin films consisting of organic dye TDBC J-aggregates (JA) and titanium oxide (TO) nanoparticles (NPs) have been fabricated successfully. The fluorescence intensity and the corresponding fluorescence quantum yield multiplied ca. 10 times and ca. twice, respectively. TO NPs have a high refractive index, and have no absorption loss like metal NPs. On the other hand, extinction (absorption) and fluorescence spectra are in general overlapped in organic dye JA, that is, so a small Stokes’ shift. Namely, the present phenomenon could be qualitatively explained by the simultaneously optical processes of both “excitation enhancement” induced directly by near-field effect from TO NPs and “emission enhancement” as a radiation of scattering field from TO NPs, which were polarized by the excitation energy from TDBC JA to TO NPs. In other words, the definite scattering peak in the extinction spectrum of TO NPs should be tuned efficiently with extinction (absorption) and fluorescence peak bands of TDBC JA.

    本文言語English
    ページ(範囲)3268-3276
    ページ数9
    ジャーナルOptical Materials Express
    10
    12
    DOI
    出版ステータスPublished - 2020 12

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料

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