Photocurrent enhancement for polymer langmuir-blodgett monolayers containing ruthenium complex by surface plasmon resonance

Nobuko Fukuda, Masaya Mitsuishi, Atsushi Aoki, Tokuji Miyashita

研究成果: Article査読

59 被引用数 (Scopus)

抄録

This paper describes effective photocurrent generation based on a polymer Langmuir-Blodgett (LB) monolayer containing ruthenium complex on a silver electrode excited by surface plasmon resonance (SPR). It was found that photocurrent generation is greatly enhanced at an incident angle where the electromagnetic field was most enhanced by SPR. At this angle, the photocurrent is enhanced by a factor of 23.6 compared with that at the critical angle for total internal reflection. The incident monochromatic photon-to-current conversion efficiency was 9.53 × 10-3%, higher than that of the corresponding polymer LB monolayer film on a transparent indium tin oxide electrode with conventional direct transmitted light (2.87 × 10-3%). Furthermore, it was demonstrated that precoating with poly(N-dodecylacrylamide) homopolymer ensures adequate separation of the Ru(bpy)3 2+ and silver surface, thereby suppressing the quenching of photoexcited Ru(bpy)3 2+ by the silver. Controlling the distance between the Ru(bpy)3 2+ layer and the silver using the Langmuir-Blodgett technique leads to effective photoexcitation of Ru(bpy)3 2+ by SPR and suppression of quenching by the silver surface, resulting in efficient photocurrent generation.

本文言語English
ページ(範囲)7048-7052
ページ数5
ジャーナルJournal of Physical Chemistry B
106
28
DOI
出版ステータスPublished - 2002 7

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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