Abstract The systems of Si-Al-O-N originated from the outstanding nitrogen ceramic of Si3N4 have received considerable attention due to their significant luminescence properties. In this work, to explore its potential in the full-spectrum lighting applications, a novel oxynitride based phosphor Lu4SiAlO8N: Ce3+ was investigated in detail by using the Rietveld refinement, DFT calculations, photoluminescent (PL) and time-resolved PL (TRPL) spectra. The results indicate that Lu4SiAlO8N performs a tight host lattice formed by the edge-sharing LuO6 polyhedrons and (Si, Al) (O, N)4 tetrahedrons; the multiple crystallographic Lu3+ sites in the host lattice contribute to the broad emission band. Under the near ultraviolet (NUV) light excitation, Lu4SiAlO8N: Ce3+ emits a bright cyan light peaked at 470 nm, and its full width at half maximum (FWHM) can reach 120 nm, which well replenishes the “cyan cavity”. Moreover, the energy transfer between the multiple luminescent centers was verified through the TRPL spectra. The temperature-dependent spectra of Lu4SiAlO8N: Ce3+ was measured to prove its acceptably thermal stability. All the results indicate the Lu4SiAlO8N: Ce3+ to be a promising candidate for the application in WLEDs.

中文翻译：

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用于 WLED 的具有宽青色发光特性的 Ce3+-活化氧氮化物 Lu4SiAlO8N 的位点占用和能量转移

摘要 源自优秀的氮化硅氮陶瓷的Si-Al-ON体系因其显着的发光性能而受到广泛关注。在这项工作中，为了探索其在全光谱照明应用中的潜力，使用 Rietveld 细化、DFT 计算、光致发光 (PL) 和时间分辨 PL (TRPL) 光谱详细研究了一种新型氮氧化物基荧光粉 Lu4SiAlO8N: Ce3+ . 结果表明，Lu4SiAlO8N 具有由共享边缘的 LuO6 多面体和 (Si, Al) (O, N)4 四面体形成的紧密主晶格；主晶格中的多个晶体 Lu3+ 位点有助于宽发射带。在近紫外 (NUV) 光激发下，Lu4SiAlO8N:Ce3+ 发出明亮的青色光，峰值为 470 nm，其半峰全宽（FWHM）可达120 nm，很好地补充了“青色腔”。此外，通过TRPL光谱验证了多个发光中心之间的能量转移。Lu4SiAlO8N:Ce3+ 的温度相关光谱被测量以证明其可接受的热稳定性。所有结果表明 Lu4SiAlO8N:Ce3+ 是 WLED 应用的有希望的候选者。