Photocurrent enhancement in porphyrin-silver nanoparticle composite films using nanostructures of silver nanoparticles

Ryuji Matsumoto, Sunao Yamada, Hiroaki Yonemura

    研究成果: ジャーナルへの寄稿学術誌査読

    9 被引用数 (Scopus)

    抄録

    The fabrication of tetraphenyl porphyrin (TPP)-silver nanoparticle (AgP) composite films on indium-tin oxide (ITO) electrodes was carried out by the electrostatic layer-by-layer adsorption technique. Maximum enhancement in photocurrent action spectra as well as in fluorescence emission spectra was observed at an immersion time of 2 h. The effects of AgP on photocurrent and fluorescence suggested the effects of enhanced electric fields resulting from a localized surface plasmon resonance on the enhancement of photocurrent and fluorescence signals. The effect of AgP on the lifetime of the singlet excited state of TPP (1TPP) indicated that the lifetime of 1TPP* decreases as compared with that in the absence of AgP substrate. The results on fluorescence lifetime suggested that the difference between the effects of AgP on photocurrent and fluorescence is most likely ascribed to the notion that the energy transfer from 1TPP* to surface plasmons due to AgP aggregates competes with photoinduced electron transfer from 1TPP* to O 2during photocurrent measurement.

    本文言語英語
    論文番号04CK07
    ジャーナルJapanese journal of applied physics
    52
    4 PART 2
    DOI
    出版ステータス出版済み - 4月 2013

    !!!All Science Journal Classification (ASJC) codes

    • 工学(全般)
    • 物理学および天文学(全般)

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