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Highly Efficient Green‐to‐Yellowish‐Orange Emitting Eu2+‐Doped Pyrophosphate Phosphors with Superior Thermal Quenching Resistance for w‐LEDs
Advanced Optical Materials ( IF 9 ) Pub Date : 2020-01-10 , DOI: 10.1002/adom.201901859 Yi Wei 1 , Zhiyu Gao 1 , Siwei Liu 1 , Shuoting Chen 1 , Gongcheng Xing 1 , Wei Wang 1 , Peipei Dang 2 , Abdulaziz A. Al Kheraif 3 , Guogang Li 1 , Jun Lin 2, 4
Advanced Optical Materials ( IF 9 ) Pub Date : 2020-01-10 , DOI: 10.1002/adom.201901859 Yi Wei 1 , Zhiyu Gao 1 , Siwei Liu 1 , Shuoting Chen 1 , Gongcheng Xing 1 , Wei Wang 1 , Peipei Dang 2 , Abdulaziz A. Al Kheraif 3 , Guogang Li 1 , Jun Lin 2, 4
Affiliation
Highly efficient green/yellowish‐orange phosphors with low thermal quenching behavior are urgently required to improve the luminescence efficiency, color stability, and color rendering of phosphor‐converted white light emitting diodes (w‐LEDs). Herein, a novel green Cs2BaP2O7:0.01Eu2+ phosphor with high luminescence efficiency (82.7%) and thermal quenching behavior (92.5% at 423 K) is reported. Besides, a further luminescence improvement in the quantum yield (98.9%) and thermal quenching resistance (120% at 448 K) is successfully achieved in green/yellowish‐orange color‐tunable Cs2MP2O7:0.01Eu2+ (M = Ba, Sr, and Ca) phosphors. Surprisingly, these green/yellowish‐orange Cs2MP2O7:0.01Eu2+ (M = Ba, Sr, and Ca) phosphors even have a prior advantage over the commercial green β‐SiAlON:Eu2+ and yellow YAG:Ce3+ phosphors. The corresponding spectral adjustment and thermal stability mechanisms are revealed, related to the optimization of local lattice symmetry. The prototype w‐LEDs exhibit warm white light with CIE color coordinate at (0.337, 0.322). The color rendering index, corrected color temperature, and luminescence efficiency can reach 92.6, 4044 K, and 152.56 lm W−1, respectively. In general, the as‐reported green/yellowish‐orange Eu2+‐doped pyrophosphate phosphors are promising candidates in the future high‐quality w‐LEDs applications. The proposal of local lattice symmetry modulation can provide a new approach to exploit novel phosphors with excellent thermal quenching resistance.
中文翻译:
适用于w-LED的高效绿色到黄橙色发光Eu2 +掺杂焦磷酸酯荧光粉,具有出色的抗热猝灭性
迫切需要具有低热猝灭行为的高效绿/黄橙色磷光体,以提高磷光转换白光发光二极管(w-LED)的发光效率,颜色稳定性和显色性。在此,报道了具有高发光效率(82.7%)和热猝灭行为(在423K下为92.5%)的新型绿色Cs 2 BaP 2 O 7:0.01Eu 2+磷光体。此外,成功地实现了绿色/淡橙色橙色可调Cs 2 MP 2 O 7:0.01Eu 2+的量子产率的进一步发光改善(98.9%)和抗热猝灭性(在448 K时为120%)。(M = Ba,Sr和Ca)荧光粉。令人惊讶的是,这些绿色/橙色橙色Cs 2 MP 2 O 7:0.01Eu 2+(M = Ba,Sr和Ca)荧光粉甚至比商业绿色β-SiAlON:Eu 2+和黄色YAG具有先发优势: Ce 3+荧光粉。揭示了与局部晶格对称性优化有关的相应光谱调节和热稳定性机制。原型w-LED发出暖白光,CIE颜色坐标为(0.337,0.322)。显色指数,校正色温和发光效率分别可以达到92.6、4044 K和152.56 lm W -1。一般而言,报告的绿色/淡黄色-橙色Eu 2+掺杂的焦磷酸盐荧光粉是未来高质量w-LED应用的有前途的候选者。局部晶格对称调制的提议可以提供一种新的方法来开发具有出色的抗热猝灭性的新型荧光粉。
更新日期:2020-03-20
中文翻译:
适用于w-LED的高效绿色到黄橙色发光Eu2 +掺杂焦磷酸酯荧光粉,具有出色的抗热猝灭性
迫切需要具有低热猝灭行为的高效绿/黄橙色磷光体,以提高磷光转换白光发光二极管(w-LED)的发光效率,颜色稳定性和显色性。在此,报道了具有高发光效率(82.7%)和热猝灭行为(在423K下为92.5%)的新型绿色Cs 2 BaP 2 O 7:0.01Eu 2+磷光体。此外,成功地实现了绿色/淡橙色橙色可调Cs 2 MP 2 O 7:0.01Eu 2+的量子产率的进一步发光改善(98.9%)和抗热猝灭性(在448 K时为120%)。(M = Ba,Sr和Ca)荧光粉。令人惊讶的是,这些绿色/橙色橙色Cs 2 MP 2 O 7:0.01Eu 2+(M = Ba,Sr和Ca)荧光粉甚至比商业绿色β-SiAlON:Eu 2+和黄色YAG具有先发优势: Ce 3+荧光粉。揭示了与局部晶格对称性优化有关的相应光谱调节和热稳定性机制。原型w-LED发出暖白光,CIE颜色坐标为(0.337,0.322)。显色指数,校正色温和发光效率分别可以达到92.6、4044 K和152.56 lm W -1。一般而言,报告的绿色/淡黄色-橙色Eu 2+掺杂的焦磷酸盐荧光粉是未来高质量w-LED应用的有前途的候选者。局部晶格对称调制的提议可以提供一种新的方法来开发具有出色的抗热猝灭性的新型荧光粉。