Open AccessRole of NH4Cl as Flux on Photoluminescence Properties of Ca1-xZrO3:Eux (x = 0.05) Synthesized by Solution Combustion Route
Author(s) -
Sudesh Kumar,
Nagaraju Kottam,
R. Preetham,
D.L. Monika
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23116
Subject(s) - photoluminescence , crystallinity , phosphor , combustion , chemistry , flux (metallurgy) , emission intensity , crystallite , analytical chemistry (journal) , doping , chemical engineering , materials science , optoelectronics , crystallography , organic chemistry , engineering
CaZrO3 ceramics exhibits high chemical, thermal and structural stability. However, its application asa host for various luminophores/activators has not been clearly explored. In present study, CaZrO3doped with Eu3+, as a potential orange-red phosphor and the effect of NH4Cl as flux during combustionsynthesis is investigated. Ca1-xZrO3:Eux (x = 0.05) nanophosphor was prepared through a lowtemperature, one pot solution combustion synthesis approach using glycine as fuel. Various wt.% ofNH4Cl (wt.% = 0, 1, 3, 5, 7) as flux added to the reaction mixture and combustion reaction wasperformed. X-ray diffraction results showed that the addition of flux has significant effect on thecrystallite size and the crystallinity of Ca1-xZrO3:Eux (x = 0.05) phosphor. From SEM morphology, theparticles were found to be significantly agglomerated. The extent of agglomeration varies with varyingthe wt.% of flux. The photoluminescence excitation and emission spectra were recorded under similarcondition to evaluate the effect of flux on the optical properties. Interestingly, the amount of flux wasfound to have significant effect on the photoluminescence emission characteristics. Thephotoluminescence intensity was found to be the maximum when the flux used was 5 wt.% and furtherincrease in flux amount the photoluminescence intensity decreases. The mechanistic aspects of effectof flux on the photoluminescence were also discussed.