Efficient photoinduced charge transfer in TiO2 nanorod/conjugated polymer hybrid materials

被引：61

作者：

Lin, Yu-Ting ^{[1
]}

Zeng, Tsung-Wei ^{[1
]}

Lai, Wei-Zong ^{[1
]}

Chen, Chun-Wei ^{[1
]}

Lin, Yun-Yue ^{[1
]}

Chang, Yu-Sheng ^{[1
]}

Su, Wei-Fang ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 10764, Taiwan

来源：

NANOTECHNOLOGY | 2006年 / 17卷 / 23期

关键词：

D O I：

10.1088/0957-4484/17/23/012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanisms of photoinduced charge transfer in composites of TiO2 nanorods with a conjugated polymer (poly(2-methoxy-5-(2'-ethyl)(hexyloxy) 1,4-phenylenevinylene) (MEH-PPV) have been investigated by steady-state, time-resolved photoluminescence (PL) spectroscopy and photoluminescence excitation (PLE) spectroscopy. Efficient charge separation takes place at the TiO2-nanorod/polymer interfaces when the polymer is excited, leading to quenching of the photoluminescence efficiency n and shortening of the measured lifetime tau(PL). In addition, the low-temperature absorption and photoluminescence spectra show that the inclusion of TiO2 nanorods in polymer can reduce disorder in conformation and enhance conjugation in the polymer chain. A photovoltaic solar cell device based on the MEH-PPV/TiO2-nanorod composite material is also presented, which shows a two order increase in short-circuit current J(SC) compared to that based on the pristine MEH-PPV.

引用

页码：5781 / 5785

页数：5

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