Optik 135 (2017) 281–289 Contents lists available at ScienceDirect Optik journal homepage: www.elsevier.de/ijleo Original research article Tuning of photoluminescence emission properties of Eu 3+ doped Gd 2 O 3 by different excitations Raunak Kumar Tamrakar a , Kanchan Upadhyay b,∗ , Ishwar Prasad Sahu c , Durga Prasad Bisen c a Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Near Bhilai House, Durg, C.G. 491001, India b Department of Chemistry, Shri Shankaracharya Vidyalaya, Hudco, Bhiali, C.G., India c School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, C.G. 492010, India a r t i c l e i n f o Article history: Received 3 November 2016 Accepted 26 January 2017 Keyword: Luminescence Phosphor Gd2O3:Eu 3+ Displays Optical response a b s t r a c t In this work, we investigated cubical particles of europium doped gadolinium oxide based material for colour tuning by different excitations. Structural properties of the material were studied by transmission electron microscopy and X-ray diffraction analysis. The Photo- luminescence (PL) technique was used to study luminescent properties of the material and its optical features were thoroughly investigated by calculating CIE chromaticity. Effect of Eu 3+ concentration on emission spectra for three excitations was also recorded. The emission intensity for 613 nm, 584 nm and 467 nm were recorded as the function of dopant ion concentration. It was observed that the blue emission quenched at 1 mol% Eu 3+ whereas red and green quenched after 2 mol% of Eu 3+ . © 2017 Elsevier GmbH. All rights reserved. 1. Introduction Rare earth ions doped materials promotes practical applications in the field of optical devices. They shows significant application in preparation of solid state laser, efficient solar cells or biologicl fluorescence label under infrared excitation [1–3]. Rare earth oxides (RE 2 O 3 ) are well known to crystallize in various structures according to the radius of RE ions. Due to their unique optical and chemical properties lanthanide doped rare earth oxide in nano range have a verity of research and practical utilities [4]. Doping of europium in rare earth oxides generates a new interaction between the atomic levels of host material and dopant material behaves as luminescence centre. This interaction between these two energy states makes them potential phosphor for application in integrated optics [5–7]. The synthesis and precise manipulation of phosphor materials on the submicron and nanoscale regime have attracted considerable attention for display and lighting technology. Phosphor particles with different luminescence emission spectra can be fabricated by the controlled doping of some specific lanthanide ions into a suitable host material. The morphology, size and synthesis process of rare earth doped phosphor considerably affects the luminescent behaviour of the phosphor materials. Each host material can accommodate a certain concentration of dopant ions, above that concentration of dopants constant decreases in luminescent behaviour is observed [8,9]. ∗ Corresponding author. E-mail address: kanchan.chemistry@gmail.com (K. Upadhyay). http://dx.doi.org/10.1016/j.ijleo.2017.01.081 0030-4026/© 2017 Elsevier GmbH. All rights reserved.