Efficient light-to-current conversion by organic-inorganic interfacial charge-transfer transitions in TiO2 chemically adsorbed with 2-anthroic acid

被引：59

作者：

Fujisawa, Jun-ichi ^{[1
,2
]}

Nagata, Morio ^{[1
]}

机构：

[1] Univ Tokyo, RCAST, Meguro Ku, Tokyo 1538904, Japan

[2] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2015年 / 619卷

基金：

日本科学技术振兴机构;

关键词：

MOLECULAR-ORBITAL METHODS; GAUSSIAN-TYPE BASIS; SURFACE MODIFICATION; TRANSFER ABSORPTION; COMPLEX; ENERGIES; TCNQ;

D O I：

10.1016/j.cplett.2014.11.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Organic-inorganic interfacial charge-transfer (ICT) transitions provide the concepts that organic-inorganic interfaces serve as a field for light absorption and charge separation directly occurs without energy loss. Here, we report efficient light-to-current conversion due to the ICT transitions in TiO2 chemically adsorbed with 2-anthroic acid. The incident photon-to-current conversion efficiency (IPCE) surpasses 85%, showing the significant improvement as compared to the reported results. Density functional analysis shows that the ICT absorption arises from strong d(pi)-pi* interactions at the inorganic-organic interface. In addition, we examined the density of states (DOS) of unoccupied surface states on TiO2 from the absorption and IPCE spectra. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：180 / 184

页数：5

共 27 条

[1] RAMAN SPECTRUM OF ANTHRACENE [J].