Kompa, Akshay Kumar and Mahesha, M G and Kekuda, Dhananjaya and Rao, Mohan K (2021) Spectroscopic investigation of defects in spin coated titania based thin films for photocatalytic applications. Journal of Solid State Chemistry, 303. ISSN 0022-4596

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Abstract

The present work focuses on Raman and photoluminescence spectroscopic study of spin coated Nd doped titania thin films annealed at 350 and 450 �C. For all the samples, the penetration depth of laser was evaluated to be about 300–350 nm. The lifetime of phonon was in the range 0.46–0.52 ps for different samples and its variation is discussed in detail. Photoluminescence (PL) spectra of Nd doped titania revealed the influence of dopant con�centration on defect sites and strong emission in near infrared (NIR) region confirms Nd doping in titania matrix. The effect of Nd doping on photocatalytic behavior of titania films was studied by degrading methyl orange (MO) under UV light. The Nd doped titania thin films enhance the photocatalytic activity as compared to pristine titania. The enhancement in efficiency is correlated to the formation of surface defects.

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