Abstract A series of novel Mn4+-activated double perovskite antimonate Sr2LaSbO6 (SLSO) far-red emitting phosphors were successfully synthesized by a high-temperature solid-state method. X-ray diffraction (XRD), photoluminescence excitation (PLE) and emission (PL) spectra, temperature-dependent photoluminescence spectra, CIE chromaticity coordinates, as well as internal quantum efficiency (IQE) were used to analyze these phosphor samples. Under 334 nm excitation, the SLSO:Mn4+ phosphors emit far red emission peaking around 694 nm due to the Mn4+: 2Eg→4A2g transition. The optimal doping concentration of Mn4+ was 0.8 mol%, moreover, the critical distance (Rc) was 40.89 A. The dipole-quadrupole interaction may be responsible for the concentration quenching mechanism of Mn4+ ions in the SLSO:Mn4+ phosphors. Furthermore, various Al3+ improved SLSO:0.008Mn4+ phosphors are investigated. When Al3+ is doped with 0.8%, the PL intensity increased by 2.92 times. In addition, the IQE of SLSO:0.008Mn4+ and SLSO:0.008Mn4+, 0.008Al3+ were found to be as high as 35.2% and 38.1%, respectively. Impressively, all chromaticity coordinates of samples located in far-red region. Therefore, these superior luminescence properties of SLSO:Mn4+ sample demonstrated its potential applications in plant cultivation and growth light-emitting diodes (LEDs).

中文翻译：

---

用于植物栽培的 Sr2LaSbO6:Mn4+ 远红荧光粉：Al3+ 离子的合成、发光特性和发射增强

摘要 采用高温固相法成功合成了一系列新型Mn4+活化双钙钛矿锑酸盐Sr2LaSbO6（SLSO）远红光荧光粉。X 射线衍射 (XRD)、光致发光激发 (PLE) 和发射 (PL) 光谱、温度相关光致发光光谱、CIE 色度坐标以及内量子效率 (IQE) 用于分析这些磷光体样品。在 334 nm 激发下，由于 Mn4+: 2Eg→4A2g 跃迁，SLSO:Mn4+ 磷光体发出远红色发射峰，峰值在 694 nm 附近。Mn4+ 的最佳掺杂浓度为 0.8 mol%，此外，临界距离 (Rc) 为 40.89 A。偶极-四极相互作用可能是 SLSO:Mn4+ 荧光粉中 Mn4+ 离子浓度猝灭机制的原因。此外，各种 Al3+ 改进了 SLSO:0。研究了 008Mn4+ 磷光体。当Al3+掺杂0.8%时，PL强度增加了2.92倍。此外，SLSO:0.008Mn4+ 和 SLSO:0.008Mn4+、0.008Al3+ 的 IQE 分别高达 35.2% 和 38.1%。令人印象深刻的是，样品的所有色度坐标都位于远红色区域。因此，SLSO:Mn4+ 样品的这些优异的发光特性证明了其在植物栽培和生长发光二极管（LED）中的潜在应用。