Synthesis of Sr<sub>6</sub>LuAl(BO<sub>3</sub>)<sub>6</sub>:Sm<sup>3+</sup> Red Phosphor with Excellent Thermal Stability and Its Application in w-LEDs
Anlin Zhang,
Yue Yang,
Yuqing Peng,
Hao Zhou,
Wei Tang,
Jianhong Jiang,
Yiting Wu,
Shiying Cai,
Lianwu Xie,
Bin Deng
Affiliations
Anlin Zhang
College of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Yue Yang
College of Chemistry & Pharmacy, Northwest A & F University, Yangling 712100, China
Yuqing Peng
College of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Hao Zhou
College of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Wei Tang
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China
Jianhong Jiang
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China
Yiting Wu
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China
Shiying Cai
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China
Lianwu Xie
College of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha 410004, China
Bin Deng
School of Chemistry and Environmental Science, Xiangnan University, Chenzhou 423043, China
In this study, a series of Sr6LuAl(BO3)6:Sm3+ 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 Sr6LuAl(BO3)6:Sm3+ 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 6H5/2 → 4F7/2. The optimum doping concentration of the Sr6LuAl(BO3)6:xSm3+ 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 (T0.5 > 480 K). Furthermore, the assembled white light-emitting diode (w-LED) device exhibits a low color temperature (5464 K), an excellent color rendering index (Ra = 95.6), and CIE coordinates (0.333, 0.336) close to those of standard white light. Collectively, these results suggest the enormous potential of Sr6LuAl(BO3)6:Sm3+ phosphors for applications in w-LEDs.
