Zhang Anlin, Yang Yue, Peng Yuqing, Zhou Hao, Tang Wei, Jiang Jianhong, Wu Yiting, Cai Shiying, Xie Lianwu, Deng Bin
College of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China.
Molecules. 2024 Nov 21;29(23):5495. doi: 10.3390/molecules29235495.
In this study, a series of SrLuAl(BO):Sm red phosphors were successfully prepared with a high-temperature solid-phase technology. The Rietveld refinement analysis of the X-ray diffraction (XRD) diffraction patterns indicated that the as-prepared phosphors belong to the R3¯ space group of the hexagonal crystal system. Under 404 nm near-ultraviolet excitation, the SrLuAl(BO):Sm phosphor exhibits narrowband emission within the range of 550 to 750 nm. The primary emission peak is observed at a wavelength of 599 nm, corresponding to H → F. The optimum doping concentration of the SrLuAl(BO):Sm phosphor is 10 mol%. Nearest-neighbor ion interaction is the mechanism of concentration quenching. The synthesized phosphors demonstrate exceptional thermal stability, with a high quenching temperature ( > 480 K). Furthermore, the assembled white light-emitting diode (w-LED) device exhibits a low color temperature (5464 K), an excellent color rendering index ( = 95.6), and CIE coordinates (0.333, 0.336) close to those of standard white light. Collectively, these results suggest the enormous potential of SrLuAl(BO):Sm phosphors for applications in w-LEDs.
在本研究中，采用高温固相技术成功制备了一系列SrLuAl(BO):Sm红色荧光粉。X射线衍射（XRD）图谱的Rietveld精修分析表明，所制备的荧光粉属于六方晶系的R3¯空间群。在404 nm近紫外激发下，SrLuAl(BO):Sm荧光粉在550至750 nm范围内呈现窄带发射。在599 nm波长处观察到主要发射峰，对应于H→F。SrLuAl(BO):Sm荧光粉的最佳掺杂浓度为10 mol%。最近邻离子相互作用是浓度猝灭的机制。合成的荧光粉表现出优异的热稳定性，具有较高的猝灭温度（>480 K）。此外，组装的白光发光二极管（w-LED）器件具有低色温（5464 K）、优异的显色指数（=95.6）以及接近标准白光的CIE坐标（0.333, 0.336）。总体而言，这些结果表明SrLuAl(BO):Sm荧光粉在w-LED应用中具有巨大潜力。
