Extraordinary enhancement of porphyrin photocurrent utilizing plasmonic silver arrays

Kosuke Sugawa; Koji Uchida; Naoto Takeshima; Shota Jin; Natsumi Tsunenari; Hideyuki Takeda; Yuki Kida; Tsuyoshi Akiyama; Joe Otsuki; Kouichi Takase; Sunao Yamada

doi:10.1039/C6NR03158G

Extraordinary enhancement of porphyrin photocurrent utilizing plasmonic silver arrays†

Kosuke Sugawa,*^a Koji Uchida,^a Naoto Takeshima,^a Shota Jin,^a Natsumi Tsunenari,^a Hideyuki Takeda,^a Yuki Kida,^a Tsuyoshi Akiyama,^b Joe Otsuki,^a Kouichi Takase^c and Sunao Yamada^d

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* Corresponding authors

^a Department of Materials and Applied Chemistry, College of Science Technology, Nihon University, Chiyoda, Tokyo 101-8308, Japan

^b Department of Materials Science, School of Engineering, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan

^c Department of Physics, College of Science and Technology, Nihon University, Chiyoda, Tokyo 101-0062, Japan

^d Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Moto-oka, Nishiku, Fukuoka, Japan
E-mail: sugawa.kosuke@nihon-u.ac.jp

Abstract

We demonstrate up to ∼630-fold enhancement of the photocurrent from a porphyrin monolayer on a plasmonic Ag-array electrode showing plasmon absorption in the Q-band region relative to that on a planar Ag electrode. The photocurrent obtained by the Q-band excitation in the plasmonic electrodes even exceeded that obtained by the Soret-band excitation in a normal, nonplasmonic electrode.

Nanoscale

Extraordinary enhancement of porphyrin photocurrent utilizing plasmonic silver arrays†

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Extraordinary enhancement of porphyrin photocurrent utilizing plasmonic silver arrays

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