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.

中文翻译：

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新型Eu2 +掺杂发蓝光的硼硅酸盐磷光体实现的全可见光谱照明

由于其独特的优势，白光发光二极管（WLED）已成为照明领域的首选之一。在传统的近紫外（NUV）芯片与发射蓝/绿/红光的荧光粉相结合的系统中，蓝绿色腔的部分缺失使得难以实现全光谱发射。因此，发蓝光的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蓝光的荧光粉是必要和紧迫的。在这里，我们设计并制备了一种新型的发蓝光的硼硅酸盐荧光粉Ba ₃ Ca ₄（BO ₃）₃（SiO ₄）Cl：x Eu ²⁺（BCBS：xEu ²⁺）。通过粉末X射线衍射和Rietveld方法确定其晶体结构。BCBS：x Eu ²⁺荧光粉具有覆盖UV-NUV区域的宽激发带，并且可以发出宽广的蓝绿色光。488 nm处的发射峰在350 nm激发下具有118 nm的大半峰全宽（FWHM）。BCBS中存在三个不同的Eu ²⁺发光中心：x Eu ²⁺，它们是通过分析结构和衰减曲线确定的。最佳浓度为x = 0.04，BCBS：0.04Eu ²⁺样品的量子效率为31.2％。另外，通过组合BCBS：Eu ₂ ⁺，Sr ₂使用395 nm NUV芯片的SiO ₄：Eu ²⁺和（Ca，Sr）AlSiN ₃：Eu ²⁺荧光粉，获得了WLED灯。发出的白光可以显示出出色的CIE =（0.3655，0.3641），CCT = 4337 K和CRI = 90.1。所有结果表明，BCBS：Eu ²⁺荧光粉在全可见光谱照明中具有潜在的应用。