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First Cellulose Langmuir-Blodgett Films towards Photocurrent Generation Systems

✍ Scribed by Keita Sakakibara; Yasuhiro Ogawa; Fumiaki Nakatsubo

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
230 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Langmuir‐Blodgett films of a cellulose derivative containing porphyrins, porphyrin‐cellulose, were fabricated in order to construct a cellulose‐based molecular photocurrent generation system. On visible light illumination of the LB monolayer film deposited on an ITO electrode, anodic photocurrents were observed with a quantum yield of 1.6% at an applied potential of 0 V versus SCE, and 3.8–4.6% at 0.2–0.3 V versus SCE. These values indicate that the self‐quenching of the photoexcited porphyrins in the cellulose LB film was suppressed, while porphyrin moieties in the LB film had a densely packed structure. This is because the porphyrins are located at a distance of approximately 1.0 nm along the cellulose backbone.

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