1. Energy transfer mechanisms in green emitting LiBaPO4:Tb3+phosphors
- Author
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Hsuan Lin Lai, Ru-Yuan Yang, Shoou-Jinn Chang, and Yu Ming Peng
- Subjects
Chemistry ,Energy transfer ,Analytical chemistry ,Concentration quenching ,Phosphor ,Chromaticity ,Luminescence ,Photon upconversion ,Ion ,Solid state reaction method - Abstract
Green emitting LiBa 1-x PO4:xTb 3+ up-conversion phosphors with various concentrations (x=0.1, 0.2, 0.3, 0.4, 0.5) of Tb 3+ ions were synthesized by solid state reaction method at 1300 □ for 3 hour in air. The impure phases were appeared as Tb 3+ ion concentration was further increased (x more than 0.2). The luminescence intensity reached a maximum when the concentration of Tb3+ ion was x = 0.2, and then decreased with the increases of the Tb 3+ concentration due to concentration quenching effect. In addition, it is identified that the d-d interaction plays a major role in the mechanism of concentration quenching of LiBaPO 4 :Tb 3+ and all the chromaticity (x, y) of LiBa 1-x PO 4 :xTb 3+ phosphors are located in the green region (0.33, 0.56 ).
- Published
- 2014
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