Synthesis and improved photoluminescence of Eu:ZnO phosphor
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Zinc oxide doped with europium has been prepared by high temperature calcination method using ZnO, Eu2O3, and LiOH. Structural characterization by X-ray diffraction and optical studies by photoluminescence spectroscopy together give evidence that Eu3+ is going to the substitutional site of Zn2+. The concentration of chemicals used, sintering temperature, and time are optimized with photoluminescence excitation spectroscopy for a sharp and intense red signal which is a signature of Eu3+. Characteristic red emission at 607 nm is observed using high-energy excitation along with the native deep center emission of ZnO peaking around 525 nm.
KeywordsZinc Oxide LiOH Eu2O3 High Temperature Calcination Photoluminescence Spectroscopy
One of the authors RK is thankful to University Grants Commission (UGC) for financial support. We would like to extend our gratitude to Mr. K. N. Sood for SEM measurements.