Full-visible-spectrum lighting realized by a novel Eu2+-doped cyan-emitting borosilicate phosphor
Full-visible-spectrum lighting realized by a novel Eu2+-doped cyan-emitting borosilicate phosphor
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新型Eu2掺杂氰基硼硅酸盐荧光粉实现全可见光谱照明
DOI：
10.1039/d0ce00794c
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发表时间：
2020-07
期刊：
影响因子：
3.1
通讯作者：
Wang Yuhua
中科院分区：
文献类型：
--
作者：
Zhang Qiang;Wang Xicheng;Wang Yuhua
白色发光二极管（WLED）由于其独特的优势，已成为照明领域的首选之一。在传统的近紫外（NUV）芯片与蓝色/绿色/红色发光磷光体组合的系统中，部分缺少蓝-绿色腔使得难以实现全光谱发射。因此，发氰磷光体可以有效地补偿该缺失部分。因此，探索具有优异发光性能的发氰荧光粉是十分必要和迫切的。在此，我们设计并制备了一种新型的硼硅酸盐氰发光材料Ba 3Ca 4（BO 3）3（SiO 4）Cl：xEu 2+（BCBS：xEu 2+）。用粉末X射线衍射和Rietveld方法测定了其晶体结构。BCBS：xEu 2+荧光粉具有宽的激发带，覆盖UV-NUV区域，并能发出宽的青色光。在488 nm处的发射峰在350 nm激发下具有118 nm的大的半高宽（FWHM）。通过分析结构和衰减曲线，确定BCBS：xEu 2+中存在三个不同的Eu 2+发光中心。当BCBS：0.04Eu ~（2+）的浓度为x = 0.04时，样品的量子效率为31.2%。此外，通过将BCBS：Eu 2+、Sr 2SiO 4：Eu 2+和（Ca，Sr）AlSiN 3：Eu 2+磷光体与395 nm NUV芯片组合，获得WLED灯。发射的白色光可以显示出CIE =（0.3655，0.3641）、CCT = 4337 K和CRI = 90.1的优异性能。结果表明，BCBS：Eu ~（2+）荧光粉在全可见光谱照明中具有潜在的应用价值。
White light-emitting diodes (WLEDs) have become one of the first choices in the field of lighting due to their unique advantages. In the traditional system of near-ultraviolet (NUV) chips combined with blue/green/red-emitting phosphors, the partial absence of a blue-green cavity makes it difficult to achieve full-spectrum emission. Accordingly, cyan-emitting phosphors can effectively compensate for this missing part. Therefore, it is necessary and urgent to explore the cyan-emitting phosphor with excellent luminous performance. Herein, we have designed and prepared a novel cyan-emitting borosilicate phosphor Ba3Ca4(BO3)3(SiO4)Cl:xEu2+ (BCBS:xEu2+). Its crystal structure was determined by powder X-ray diffraction and Rietveld methods. The BCBS:xEu2+ phosphors have a wide excitation band covering the UV-NUV region and can emit a broad cyan light. The emission peaks at 488 nm have a large full width at half maximum (FWHM) of 118 nm, excited by 350 nm. There are three different Eu2+ luminescence centers in BCBS:xEu2+, which are determined by analyzing the structure and decay curves. The optimal concentration was x = 0.04 and the quantum efficiency of the BCBS:0.04Eu2+ sample was 31.2%. In addition, by combining BCBS:Eu2+, Sr2SiO4:Eu2+ and (Ca,Sr)AlSiN3:Eu2+ phosphors with a 395 nm NUV chip, a WLED lamp was obtained. The emitted white light can display excellent performances of CIE = (0.3655, 0.3641), CCT = 4337 K and CRI = 90.1. All the results demonstrate that the BCBS:Eu2+ phosphors have potential applications in full-visible-spectrum lighting.
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影响因子：
3.7
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影响因子：
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