摘要
通过表面光电压谱(SPS)和场诱导表面光电压谱(FISPS)研究一种新型的多孔二氧化钛(P-TiO2)材料.结果表明,特殊的多孔结构使得该材料具有丰富的表面态,使P-TiO2的光伏响应区间可扩展至可见光区,并产生了带-带跃迁和表面态跃迁两个强度相当的响应带;表现出表面态对光生电荷的定域效应,使得带-带跃迁和表面态跃迁在外电场作用下产生明显不同.
The photovohage properties of a new type of porous TiO2 （ P-TiO2 ） were investigated through surface photovohage spectroscopy （SPS） and field induced surface photovohage spectroscopy （FISPS）. The abundant surface states, which were related to the special porous structure, extended the SPS response band of P-TiO2 to visible light region （500 nm） , and made the intensity of surface state transition equal to that of band-band transition. When an external electric field was added, the changes in the intensity of surface state transition were not so obvious compared with that of band-band transition. These results exhibit strong ＂ localized effect＂, induced by the surface states.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2010年第6期1039-1042,共4页
Journal of Jilin University:Science Edition
基金
国家重点基础研究发展计划973项目基金(批准号:2007CB613303)
