Optical and structural properties of highly porous shell structured Fe doped TiO_2 thin films

作     者：C.S.Naveen P.Raghu H.M.Mahesh K.Narasimha Rao R.Rakesh Kumar A.R.Phani 

作者机构：Department of Electronic Science Bangalore UniversityJnanabharathi Department of Instrumentation and Applied PhysicsIndian Institute of Science Nano-Research for Advanced Materials and Technologies(Nano-RAM Technologies) 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2014年第33卷第5期

页      面：578-582页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：Fe TiO2 Porous shell Sol–gel 

摘      要：TiO2thin films with 0.2 wt%, 0.4 wt%, 0.6wt%, and 0.8 wt% Fe were prepared on glass and silicon substrates using sol–gel spin coating technique. The optical cut-off points are increasingly red-shifted and the absorption edge is shifted over the higher wavelength region with Fe content increasing. As Fe content increases, the optical band gap decreases from 3.03 to 2.48 eV whereas the tail width increases from 0.26 to 1.43 eV. The X-ray diffraction（XRD） patterns for doped films at 0.2 wt% and0.8 wt% Fe reveal no characteristic peaks, indicating that the film is amorphous whereas undoped TiO2exhibits（101） orientation with anatase phase. Thin films of higher Fe content exhibit a homogeneous, uniform, and nanostructured highly porous shell morphology.