Molecular photosensors of self-assembled monolayers: electron acceptor-photosensitizer dyad on an ITO surface

被引：16

作者：

Hyung, KH

Kim, DY

Han, SH

机构：

[1] Hanyang Univ, Dept Chem, Seoul 133791, South Korea

[2] Korea Inst Sci & Technol, Optoelect Mat Res Ctr, Seoul 136791, South Korea

来源：

NEW JOURNAL OF CHEMISTRY | 2005年 / 29卷 / 08期

关键词：

D O I：

10.1039/b502353j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-assembled monolayers of di-(3-diaminopropyl)-viologen (DAPV) were prepared on a tin-doped indium oxide (ITO) surface as acceptor layers. Photoactive layers of Ru(2,2'-bipyridine-4,4'-dicarboxylic acid)(2)( NCS)(2) were formed on DAPV to give an acceptor - sensitizer dyad on ITO. The photon energy was monitored by measuring the ITO conductivity change. Under illumination, the ITO conductivity increased with the current increasing by increments of 8 nA indicating the construction of molecular photosensors on the ITO surface. The concept of a molecular photosensor was further applied to a molecular photovoltaic system. The presence of the viologen moiety bridges the energy levels between the LUMO of the Ru sensitizer and ITO, and improves the efficiency of a photovoltaic cell with a quantum yield of 18.4% at 3.3 mW cm(-2).

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页码：1022 / 1026

页数：5

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