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Enhanced luminescence performance of CaO:Ce3+,Li+,F− phosphor and its phosphor-in-glass based high-power warm LED properties†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-06 00:00:00 , DOI: 10.1039/c8tc00813b Jiankun Deng 1, 2, 3, 4, 5 , Haoran Zhang 1, 2, 3, 4, 5 , Xuejie Zhang 1, 2, 3, 4, 5 , Maxim S. Molokeev 6, 7, 8, 9, 10 , Jianbei Qiu 5, 11, 12, 13 , Yingliang Liu 1, 2, 3, 4, 5 , Bingfu Lei 1, 2, 3, 4, 5 , Li Ma 14, 15, 16, 17 , Xiaojun Wang 14, 15, 16, 17
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-06 00:00:00 , DOI: 10.1039/c8tc00813b Jiankun Deng 1, 2, 3, 4, 5 , Haoran Zhang 1, 2, 3, 4, 5 , Xuejie Zhang 1, 2, 3, 4, 5 , Maxim S. Molokeev 6, 7, 8, 9, 10 , Jianbei Qiu 5, 11, 12, 13 , Yingliang Liu 1, 2, 3, 4, 5 , Bingfu Lei 1, 2, 3, 4, 5 , Li Ma 14, 15, 16, 17 , Xiaojun Wang 14, 15, 16, 17
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To obtain white light-emitted diodes (wLEDs) with a low correlated color temperature (CCT) and a high color rendering index (CRI), red-emission is indispensable in their emission spectra. Herein, CaO:Ce3+,Li+,F− yellow phosphors with more red spectral component have been prepared via a high temperature solid-state reaction. As compared to the F− undoped samples, CaO:Ce3+,Li+,F− phosphor have lower critical doping concentration of Ce3+ and show stronger luminescence. At the critical concentration, a quantum efficiency of 66.4% and enhanced thermal and chemical stability were obtained in CaO:Ce3+,Li+,F−. Furthermore, a CaO:Ce3+,Li+,F−-based phosphor-in-glass (PiG) using the red-emitting glass system with the composition of SiO2–Na2CO3–Al2O3–CaO:Eu3+ as the host material was constructed and used for high-power white LED applications. Such PiG samples with different phosphor doping concentrations can satisfy various light color demands and display higher reliability than the CaO:Ce3+,Li+,F− phosphor. An optimal PiG-based wLED exhibits color coordinates of (0.3769, 0.3386), a CCT of 3774 K, a CRI of 82.5 and a LE of 73.1 when the mass ratio of phosphor to glass matrix was 7 : 50 in PiG. Moreover, such PiG-based wLED also showed acceptable color stability under different drive currents. All the above results demonstrate that CaO:Ce3+,Li+,F− can be expected to be a potential alternative yellow phosphor for blue light excited PiG based warm wLEDs, particularly for high-power devices.
中文翻译：
钙的发光增强性能：铈3+，李+，F -磷和磷在玻璃基高功率LED保暖性能†
为了获得具有低相关色温（CCT）和高显色指数（CRI）的白光发光二极管（wLED），红色发射在其发射光谱中必不可少。在此，氧化钙：Ce的3+，李+，F -黄色磷光体与更多的红色光谱分量已经制备通过高温固相反应。相比于在F -未掺杂的样品，氧化钙：Ce的3+，李+，F -荧光体具有的Ce低临界掺杂浓度3+和表现出更强的发光。在临界浓度下，CaO：Ce的量子效率为66.4％，并具有增强的热稳定性和化学稳定性。3+，李+，F - 。此外，CaO的：Ce的3+，李+，F -使用红色发光的玻璃系统的SiO的组合物为基础的磷光体玻璃材料（猪） 2 -Na 2 CO 3 -Al 2 ø 3 -CaO：构造了Eu 3+作为主体材料，并将其用于高功率白光LED应用。与CaO：Ce 3+，Li +，F-相比，具有不同磷光体掺杂浓度的此类PiG样品可以满足各种光色要求并显示出更高的可靠性。磷。当磷光体与玻璃基质的质量比为7:50时，最佳的基于PiG的wLED的色坐标为（0.3769，0.3386），CCT为3774 K，CRI为82.5，LE为73.1。而且，这种基于PiG的wLED在不同的驱动电流下也显示出可接受的颜色稳定性。所有上述结果证明，氧化钙：Ce的3+，李+，F -可以被预期可用于蓝色光激发的猪基于温暖的WLED，特别是对于高功率器件的潜在替代黄色荧光体。
更新日期：2018-03-06
中文翻译：
钙的发光增强性能：铈3+，李+，F -磷和磷在玻璃基高功率LED保暖性能†
为了获得具有低相关色温（CCT）和高显色指数（CRI）的白光发光二极管（wLED），红色发射在其发射光谱中必不可少。在此，氧化钙：Ce的3+，李+，F -黄色磷光体与更多的红色光谱分量已经制备通过高温固相反应。相比于在F -未掺杂的样品，氧化钙：Ce的3+，李+，F -荧光体具有的Ce低临界掺杂浓度3+和表现出更强的发光。在临界浓度下，CaO：Ce的量子效率为66.4％，并具有增强的热稳定性和化学稳定性。3+，李+，F - 。此外，CaO的：Ce的3+，李+，F -使用红色发光的玻璃系统的SiO的组合物为基础的磷光体玻璃材料（猪） 2 -Na 2 CO 3 -Al 2 ø 3 -CaO：构造了Eu 3+作为主体材料，并将其用于高功率白光LED应用。与CaO：Ce 3+，Li +，F-相比，具有不同磷光体掺杂浓度的此类PiG样品可以满足各种光色要求并显示出更高的可靠性。磷。当磷光体与玻璃基质的质量比为7:50时，最佳的基于PiG的wLED的色坐标为（0.3769，0.3386），CCT为3774 K，CRI为82.5，LE为73.1。而且，这种基于PiG的wLED在不同的驱动电流下也显示出可接受的颜色稳定性。所有上述结果证明，氧化钙：Ce的3+，李+，F -可以被预期可用于蓝色光激发的猪基于温暖的WLED，特别是对于高功率器件的潜在替代黄色荧光体。
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