Cover Page March-2015-Advanced Materials Letters

Advanced Materials Letters

Volume 6, Issue 3, Pages 201-208, March 2015
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Photoluminescence And Photoconductivity Of Ni Doped Titania Nanoparticles

Anand Kumar Tripathi1, Mohan Chandra Mathpal1*, Promod Kumar2, Vivek Agrahari1, Manish Kumar Singh3, Sheo Kumar Mishra4, M. M. Ahmad2, Arvind Agarwal

1Department of Physics, Motilal Nehru National Institute of Technology, Allahabad 211004, India

2Department of Physics, National Institute of Technology, Hazratbal, Srinagar 190006, India

3Department of Physics, LNM Institute of Information Technology, Jaipur 302031, India

4Department of Physics, University of Lucknow, Lucknow 22607, India

Adv. Mater. Lett., 2015, 6 (3), pp 201-208

DOI: 10.5185/amlett.2015.5663

Publication Date (Web): Feb 22, 2015

E-mail: mohanatnpl@gmail.com

Abstract

The Ni doped titania nanostructures were synthesized by sol-gel method followed by calcination at 400°C for one hour. The optical band gap for these nanostructures indicates the red shift. The doped TiO2 nanostructures are spherical in shape. The pure TiO2 exhibits all the possible emission bands while Ni-doped TiO2 nanoparticles show blue-green emission bands. The results suggest that Ni2+ replace some Ti4+ in TiO2 lattice with tensile strain while TiO2 remained in the form of anatase phase, reduces its band gap energy. The synthesized TiO2 exhibits enhanced photoconducting properties. The work suggest that the titania based materials can have potential applications in photovoltaics, optoelectronic devices and photoconductors in replacement of expansive materials by controlling the compositions and morphology of the nanostructures.

Keywords

Crystal structure, nanoparticles, photoconductivity, photoluminescence.

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