Novel orange-yellow-green color-tunable Bi3+-doped Ba3Y4−wLuwO9 (0 ≤ w ≤ 4) luminescent materials: site migration and photoluminescence control
作者： Gongcheng Xing , Zhiyu Gao , Mengxuan Tao , Yi Wei , Yixin Liu
DOI: 10.1039/C9QI01099H
关键词:
摘要: A novel orange-yellow-emitting Ba3Y4O9:Bi3+ phosphor (550 nm) has been firstly discovered. Meanwhile, we report isomorphic Ba3Lu4O9:Bi3+ with green emission (526 nm). Based on the cation substitution strategy, a series of Ba3Y4−wLuwO9:Bi3+ (0 ≤ w 4) solid solution phases are successfully constructed, realizing consecutive photoluminescence control from orange-yellow to light. The occurrence site migration Bi3+ ions Y2/Lu2 and Y4/Lu4 Y1/Lu1 Y3/Lu3 sites results in blueshift 4), which is confirmed by linear increase PL intensity I(1+3)/I(2+4) Lu3+ for Y3+ ions. Besides, improved thermal stability originates better structure rigidity. fabricated white light-emitting diodes (WLEDs) exhibit excellent warm light, indicating that as-prepared phosphors can act as yellow emitting component WLED lighting.
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