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Optical and structural properties of highly porous shell structured Fe doped TiO2 thin films

Naveen, CS and Raghu, P and Mahesh, HM and Rao, Narasimha K and Kumar, Rakesh R and Phani, AR (2014) Optical and structural properties of highly porous shell structured Fe doped TiO2 thin films. In: RARE METALS, 33 (5). pp. 578-582.

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Official URL: http://dx.doi.org/ 10.1007/s12598-014-0236-0


TiO2 thin films with 0.2 wt%, 0.4 wt%, 0.6 wt%, 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% and 0.8 wt% Fe reveal no characteristic peaks, indicating that the film is amorphous whereas undoped TiO2 exhibits (101) orientation with anatase phase. Thin films of higher Fe content exhibit a homogeneous, uniform, and nano-structured highly porous shell morphology.

Item Type: Journal Article
Publication: RARE METALS
Additional Information: Copy right for this article belongs to the NONFERROUS METALS SOC CHINA, 12B FUXIN RD, BEIJING 100814, PEOPLES R CHINA
Keywords: Fe; TiO2; Porous shell; Sol-gel
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 28 Nov 2014 05:38
Last Modified: 28 Nov 2014 05:38
URI: http://eprints.iisc.ac.in/id/eprint/50341

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