Open AccessInvestigation of ab-inito, Photoluminescence and electrical studies of Li2Co(WO4)2
Author(s) -
D.L. Shruthi,
G.N. Anil Kumar,
A. Jagannatha Reddy
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1219/1/012003
Subject(s) - photoluminescence , phosphor , triclinic crystal system , materials science , crystallite , band gap , diffraction , analytical chemistry (journal) , doping , crystal structure , crystallography , optoelectronics , chemistry , optics , physics , chromatography , metallurgy
The optical properties of the material is depends on the site occupancy of the doping in the host lattice. In the present study, wereport the synthesis, characterisation, optical properties and ab-initio studies of Li 2 Co(WO 4 ) 2 microcrystals synthesized by traditional and easy solid state method. The x-ray diffraction study shows the compound which arecrystallized in the triclinic crystal system space group PÏ.The average crystallite size was estimated from diffraction study found to be 109 nm. From UV-Visible spectroscopic study the calculated band gap is 2.69 eV for the phosphor. The Li 2 Co(WO 4 ) 2 phosphors shows the Photoluminescence under an excitation wavelength of 331 nm. A strong blue green peak emission at 447 nm was observed due to the transition from 3 T 1 u levels to the 1 A 1 g level. The electrical impedance studies were carried out to enunciate the impedance behaviour of Li 2 Co(WO 4 ) 2 and to depict different conduction and relaxation processes.Further, theab-initiostudies were carried out in detail to understand electronic properties of the phosphor.