Abstract
Zinc silicate phosphors co-doped with Eu 3+ ions and also with both Eu 3+ and Tb 3+ ions were prepared by high temperature solid state reaction in air or reducing atmosphere. The luminescence characteristics of the prepared phosphors were investigated. While in the samples prepared in air, Eu 3+ emission was found to be dominant over Tb 3+ emission, in the samples prepared in reducing atmosphere, intense Eu 2+ emission at 448 nm was found to be predominant over narrow Tb 3+ emission. Luminescence studies showed that Eu 3+ ions occupy asymmetric sites in Zn 2SiO 4 lattice. The intense f–f absorption peak of Eu 3+ at 395 nm observed in these phosphors suggests their potential as red emitting phosphors for near ultra-violet light emitting diodes.
Published Version
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