TiO2-CdSe nanowire arrays showing visible-range light absorption

被引：46

作者：

Lee, Jung-Chul

Sung, Yun-Mo ^{[1
]}

Kim, Tae Geun

Choi, Heon-Jin

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

[2] Korea Univ, Dept Elect Engn, Seoul 136713, South Korea

[3] Yonsei Univ, Sch Adv Mat Sci & Engn, Seoul 120749, South Korea

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1063/1.2783229

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-density single crystalline TiO2 nanowires (similar to 50 nm diameter) were grown on Ti substrates by chemical vapor deposition, and they were overcoated with the solution containing CdSe nanocrystals (similar to 5 nm diameter) and heat treated at 600 degrees C to form TiO2 hetersotructured nanowire arrays. The TiO2 nanowire arrays showed uniformly distributed CdSe nanocrystals and high crystallinity of rutile and wurtzite from the TiO2 and the CdSe, respectively. Owing to the heterostructure of TiO2, they demonstrate almost full visible-range light absorption, and thus enhanced photocatalytic activity by the charge separation via electron and hole transfers between the CdSe and the TiO2.

引用

页数：3

共 20 条

[1] Highly efficient dye-sensitized solar cells with a titania thin-film electrode composed of a network structure of single-crystal-like TiO2 nanowires made by the "oriented attachment" mechanism [J].