Photoluminescence and photoconductivity of Ni doped titania nanoparticles 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
Publication Date (Web): Feb 22, 2015
Copyright © IAAM-VBRI Press
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.
Crystal structure, nanoparticles, photoconductivity, photoluminescence.