Synthesis, characterization and electrical properties of PANI-Ni2O3 nanocomposites. (2018)

• Record Type: Journal Article
• Authors: Bai, D. Syamala; Suvarna, R. Padma; Nagabhushana, B.M.
• Is Part Of: Materials today. Volume 5:Number 10(2018)Part 1
• Page Start: 20793
• Page End: 20802
• Publication Date: 2018
• Subjects: Green synthesis -- AC conductivity -- Dielectric constant -- Tangent loss; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2018.06.464
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: White emitting Na3 Gd(PO4 )2 nanocrystalline phosphors doped with trivalent dysprosium (Dy 3+ ) ions were synthesized by using citrate gel combustion technique. The structure of the compound is found to be orthorhombic with a particle size is 10 nm. Luminescence properties have been characterized using photoluminescence (PL), excitation, emission spectra and decay time measurements. In emission spectrum sharp emission peaks were observed 4 F9/2 → 6 H15/2 (blue) and 4 F9/2 → 6 H13/2 (yellow) transition of Dy 3+ ions. From the concentration dependent PL studies, the optimum concentration of Dy 3+ ions in Na3 Gd(PO4 )2 is found to be 1.0 mol %, where intense near white light for 352 nm pump wavelength. The yellow to blue intensity ratios, CIE chromaticity coordinates and correlated color temperature studies has shown the possibility of using this phosphor for W-LEDs.