The relationship between the structure and properties is always a hot topic in the luminescent material field. In this work, a new phosphor KBa₂(PO₃)₅:Eu²⁺ (KBP:Eu) was prepared by a high-temperature solid-state reaction method and characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy, photoluminescence (PL), and electroluminescence studies. The polyphosphate host KBP offers three lattice environments (K1, Ba1, and Ba2) for Eu²⁺ ions to realize broad-band emission from 380 to 700 nm under 345 nm excitation. The distributions of Eu²⁺ in the three lattice sites can be proven by low-temperature PL and transient fluorescence spectroscopy. Furthermore, temperature-dependent luminescence studies for phosphor KBP:0.02Eu reveal that its luminescence intensity at 150 °C retains about 97% of the initial value at 25 °C. By composing a 365 nm UV chip and KBP:0.02Eu, CaAlSiN₃:Eu²⁺ phosphors, a warm white-light-emitting diode (WLED) was obtained with a correlated color temperature of 5146 K and chromaticity coordinates (0.3404, 0.3384). Therefore, KBP:Eu phosphor is a potential cyan-emitting phosphor used for high-power WLEDs.

中文翻译：

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Eu2多位占据引起的具有宽带蓝绿色发射的热稳定荧光粉KBa2（PO3）5：Eu2 +。

结构与性能之间的关系一直是发光材料领域的热门话题。在这项工作中，通过高温固态反应方法制备了新型荧光粉KBa ₂（PO ₃）₅：Eu ²⁺（KBP：Eu），并通过X射线衍射，能量色散X射线光谱法进行了表征。 ，光致发光（PL）和电致发光研究。聚磷酸盐基质KBP为Eu ²⁺离子提供了三种晶格环境（K1，Ba1和Ba2），以在345 nm激发下实现380至700 nm的宽带发射。Eu ²⁺的分布低温PL和瞬态荧光光谱法可以证明这三个晶格中的碳原子数。此外，对磷光体KBP：0.02Eu的温度依赖性发光研究表明，其在150°C时的发光强度保留了25°C时约97％的初始值。通过组成365 nm UV芯片和KBP：0.02Eu，CaAlSiN ₃：Eu ²⁺荧光粉，获得了暖色发光二极管（WLED），其相关色温为5146 K，色度坐标为（0.3404，0.3384） 。因此，KBP：Eu磷光体是用于高功率WLED的潜在发蓝光磷光体。