Abstract A series of Sm3+-doped La3Si6N11 phosphor materials were synthesized by a high temperature solid-state reaction method. The crystal structure, microstructure, photoluminescence properties, decay curves as well as thermal quenching properties of the as-prepared phosphors were investigated systematically. The excitation spectra contain a wide asymmetric band below 350 nm originating from the host absorption, several sharp excitation peaks in the range of 300–550 nm corresponding to f-f transition of Sm3+. Under the excitation of 369 and 414 nm light, the phosphors exhibit strong narrow-band orange-red emission peaked at 605 nm. The average decay time of La2.99Si6N11:0.01Sm3+ sample is fitted to be 0.38 ms and the CIE coordinates were calculated to be (0.6105, 0.3833). For water resistance, La3Si6N11:Sm3+ is better than K2SiF6:Mn4+ phosphor. After soaking in deionized water for 300 min, the La3Si6N11:Sm3+ sample retains approximately 80% of its initial relative emission intensity. When the temperature rises to 423 K (150 °C), the emission intensity of La2.99Si6N11:0.01Sm3+ sample remains 85% in comparison to that of room temperature. The activation energy was calculated to be 0.63253 eV, which is higher than those of Sm3+-activated oxide phosphors, indicating that the phosphor has relatively good thermal stability.

中文翻译：

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Sm3+激活的La3Si6N11作为橙红色荧光粉的合成及光致发光性能

摘要 采用高温固相反应法合成了一系列Sm3+掺杂的La3Si6N11荧光粉材料。系统地研究了所制备荧光粉的晶体结构、微观结构、光致发光性能、衰减曲线以及热猝灭性能。激发光谱包含来自主体吸收的低于 350 nm 的宽不对称带，在 300-550 nm 范围内的几个尖锐激发峰对应于 Sm3+ 的 ff 跃迁。在 369 和 414 nm 光的激发下，荧光粉表现出强烈的窄带橙红色发射，峰值为 605 nm。La2.99Si6N11:0.01Sm3+ 样品的平均衰减时间拟合为 0.38 ms，计算得到的 CIE 坐标为 (0.6105, 0.3833)。在耐水性方面，La3Si6N11:Sm3+ 优于 K2SiF6:Mn4+ 荧光粉。在去离子水中浸泡 300 分钟后，La3Si6N11:Sm3+ 样品保留了其初始相对发射强度的大约 80%。当温度升至 423 K (150 °C) 时，La2.99Si6N11:0.01Sm3+ 样品的发射强度与室温相比保持 85%。经计算，活化能为0.63253 eV，高于Sm3+活化的氧化物荧光粉，表明该荧光粉具有较好的热稳定性。