Combinatorial search for green and blue phosphors of high thermal stabilities under UV excitation based on the K(Sr1-x-y)PO4:Tb3+ xEu2+y system.
The present investigation aims at the synthesis of KSr 1-x-y PO 4:Tb(3+) x Eu(2+) y phosphors using the combinatorial chemistry method. We have developed square-type arrays consisting of 121 compositions to investigate the optimum composition and luminescence properties of KSrPO 4 host matrix under 365 nm ultraviolet (UV) light. The optimized compositions of phosphors were found to be KSr 0.93PO 4:Tb(3+) 0.07 (green) and KSr 0.995PO 4:Eu(2+) 0.005 (blue). These phosphors showed good thermal luminescence stability better than commercially available YAG:Ce at temperature above 200 degrees C. The result indicates that the KSr 1-x-y PO 4:Tb(3+) x Eu (2+)y can be potentially useful as a UV radiation-converting phosphor for light-emitting diodes.
Chan
Ting-Shan
TS
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
Liu
Yao-Min
YM
Liu
Ru-Shi
RS
D003116:Color; D020650:Combinatorial Chemistry Techniques; D004355:Drug Stability; D005063:Europium; D006358:Hot Temperature; D049408:Luminescent Agents / Q000737:chemistry*; D010710:Phosphates; D013725:Terbium; D014466:Ultraviolet Rays
D049408:Luminescent Agents; D010710:Phosphates; D013725:Terbium; D005063:Europium