Photoluminescence And Photoconductivity Of Ni Doped Titania Nanoparticles

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

Copyright © IAAM-VBRI Press

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.