| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7908761 | Optical Materials | 2016 | 7 Pages |
Abstract
GdAlO3:Dy3+ Ba2+ phosphors are synthesized by citrate-based sol-gel method. Photoluminescence and positron annihilation studies are used to investigate the emission and defect chemistry of the phosphors respectively. The strong yellow (Dy3+) emission properties of phosphors are discussed for various concentrations of Dy3+ ions. Upon the addition of Ba2+ ion, an enhancement in emission intensity is observed due to the lattice distortions around Dy3+ ion. The positron studies indicate the presence of defects at crystallite boundaries, vacancy clusters and large voids in the materials. The influence of Ba2+ ion on the photoluminescence and lattice distortion around Dy3+ is also explored.
Related Topics
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Authors
Thangaraj Selvalakshmi, Selvakumar Sellaiyan, Akira Uedono, Takaaki Semba, Arumugam Chandra Bose,