Observation of carrier dynamics in CdO thin films by excitation with femtosecond laser pulse

被引：60

作者：

Kawamura, K

Maekawa, K

Yanagi, H

Hirano, M

Hosono, H

机构：

[1] Japan Sci & Technol, ERATO, Hosono Transparent Electroact Mat TEAM Project, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

[2] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

THIN SOLID FILMS | 2003年 / 445卷 / 02期

关键词：

optical spectroscopy; band structures; BAND-GAP; CONDUCTIVITY; ZNO;

D O I：

10.1016/S0040-6090(03)01172-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Non-equilibrium dynamics of photoexcited carrier in cadmium oxide thin films were examined by the pump-probe transient optical transmission measurement technique using the second harmonics (400 nm) of femtosecond pulses as a pump light. Time-dependent blueshift of the absorption edge was clearly observed and it reached a maximum at similar to1 ps after the pumping. The magnitude of the blueshift increases with pump light power, which was well fitted to Burstein-Moss formula. The relaxation time of excited electrons from the bottom of the conduction band was obtained similar to350 ps and an effective mass for the electron carrier was estimated as similar to0.3m(e). (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：182 / 185

页数：4

共 13 条

[1] First-principles calculations for understanding high conductivity and optical transparency in InxCd1-x films [J].