Abstract A novel broadband (SrCa)2La(PO4)3O: Eu2+ phosphor was successfully synthesized by the conventional high-temperature solid-state reaction. The samples are of phase purity demonstrated by XRD analysis. The photoluminescence properties of the (SrCa)2La(PO4)3O: Eu2+ phosphor were investigated systematically. Under the excitation of 365 nm near-ultraviolet light, the phosphors exhibit absorption in the ultraviolet–visible spectral region of 280–420 nm and show an intense asymmetric broadband blue emission peaking at around 460 nm. The different crystallographic sites of Eu2+ in (SrCa)2La(PO4)3O: Eu2+ phosphors have been verified via the photoluminescence properties. The concentration quenching mechanism, decay property, and thermal stability of the phosphor have been discussed in detail. The investigation results indicate that the as-prepared (SrCa)2La(PO4)3O: Eu2+ phosphor will have application potential in near-ultraviolet pumped white light-emitting diodes.

中文翻译：

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发蓝光的 (SrCa)2La(PO4)3O: Eu2+ 荧光粉的合成和光谱研究

摘要 通过常规高温固相反应成功合成了一种新型宽带(SrCa)2La(PO4)3O:Eu2+荧光粉。样品具有通过XRD分析证明的相纯度。系统地研究了(SrCa)2La(PO4)3O:Eu2+荧光粉的光致发光特性。在 365 nm 近紫外光的激发下，磷光体在 280-420 nm 的紫外-可见光谱区表现出吸收，并在 460 nm 附近显示出强烈的不对称宽带蓝色发射峰。Eu2+ 在 (SrCa)2La(PO4)3O: Eu2+ 荧光粉中的不同结晶位点已通过光致发光特性得到验证。详细讨论了荧光粉的浓度猝灭机制、衰减特性和热稳定性。