Photocatalytic property and deep levels of Nb-doped anatase TiO2 film grown by metalorganic chemical vapor depostion

被引：40

作者：

Miyagi, T

Kamei, M

Sakaguchi, I

Mitsuhashi, T

Yamazaki, A

机构：

[1] NIMS, AML, Tsukuba, Ibaraki 3050044, Japan

[2] Waseda Univ, Sch Sci & Engn, Dept Resource & Environm Engn, Sinjuku Ku, Tokyo 169855, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2004年 / 43卷 / 02期

关键词：

photocatalysis; Nb doping; anatase; titanium dioxide; MOCVD; DLTS; deep level;

D O I：

10.1143/JJAP.43.775

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A Nb-doped anatase TiO2 (Nb: 5 at%) film was grown on a SrTiO3(001) substrate by metalorganic chemical vapor deposition. Deep level transient spectroscopy analysis revealed that this film possessed two kinds of deep levels due to the Nb ions, which were found to exist at 0.32 eV and 0.67 eV below the bottom of the conduction band. The photocatalytic activity of this film was low compared with that of the undoped anatase film, suggesting that the deep levels acted as recombination centers of photoexcited electron-hole pairs.

引用

页码：775 / 776

页数：2

共 8 条

[1] THE ROLE OF METAL-ION DOPANTS IN QUANTUM-SIZED TIO2 - CORRELATION BETWEEN PHOTOREACTIVITY AND CHARGE-CARRIER RECOMBINATION DYNAMICS [J].