期刊
PHYSICAL REVIEW B
卷 61, 期 12, 页码 8262-8269出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.8262
关键词
-
Transient photoconductivity in thin-film NbxTi1-xO2 and TiO2 was studied as a function of temperature, light intensity, illumination time, and ambient composition in a time range of 10(-2)-10(7) s. Both excitation and relaxation transients were slow and followed a nonexponential rate law. A conductivity model predominantly involving hole capture by O-2(-) at the surface is proposed. It was possible to use a Laplace transform method to determine the free electron density and the photoinduced change in the surface barrier caused by hole capture at the surface. In argon, both the oxygen adsorption rate and the rate at which excess electrons reach the surface may contribute to the decay whereas only the latter may be important in air.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据