荧光粉
材料科学
色度
发光效率
显色指数
发光
离子
分析化学(期刊)
量子效率
兴奋剂
发光二极管
光电子学
光学
化学
物理
纳米技术
有机化学
色谱法
图层(电子)
作者
Le Thi Thuy My,Nguyen Le Thai,Thuc Minh Bui,Hsiao-Yi Lee,Nguyễn Đoàn Quốc Anh
出处
期刊:Materials Science Poland
[De Gruyter]
日期:2022-12-01
卷期号:40 (4): 105-113
标识
DOI:10.2478/msp-2022-0050
摘要
Abstract Yttrium borate phosphor co-doping Ce 3+ , Tb 3+ ions (YBO 3 : Ce 3+ , Tb 3+ ) is fabricated using solid state reaction, and then its luminescence is investigated through the computational energy transfer process. Under excited near-UV light, this YBO 3 : Ce 3+ , Tb 3+ phosphor exhibits strong absorption with broad and sharp emission bands due to the 4f – 5d and 5d – 4f transitions of Ce 3+ ions and the 4f – 4f transition of Tb 3+ ions, respectively. The phosphor's emission chromaticity could be tunable by adjusting the concentration of doping ions. With 15% Tb 3+ and 3% Ce 3+ in the composition, the phosphor can gain maximum 76.7% external quantum efficacy. The phosphor is proposed for utilization in the phosphor package of white light-emitting diodes (WLEDs) to enhance their lighting performances. The findings point out that by modifying YBO 3 : Ce 3+ , Tb 3+ concentration (5% – 10%), improvements in luminous intensities, color consistency, and color rendering indices can be observed. The higher concentration (10%) of YBO 3 : Ce 3+ , Tb 3+ is more advantageous to the luminous flux and chromatic uniformity in cases of 4000 K and 5000 K WLEDs, while lower (5%) concentration greatly benefits those properties in the case of 3000 K WLED. Regardless of CCTs, the WLEDs show a reduction in chromatic reproduction efficiency with the increasing concentration of YBO 3 : Ce 3+ , Tb 3+ . Hence, this green phosphor could be a good material for high-luminescence WLED, yet the modification of phosphor concentration is advisable if the simultaneous good chromaticity is desired.
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