Xiong Hongrui, Gao Xi, Yuan Fei, Wu Qiqi, Zhang Wentao, Huang Yi
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China.
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China.
Dalton Trans. 2022 Jun 7;51(22):8874-8884. doi: 10.1039/d2dt01034h.
The orange-emitting Ca(PO)SiO:Sm (CPSO:Sm) phosphor was prepared a simple solid-state method, and the charge compensators A (A = Li, Na and K) were codoped into CPSO:Sm for improving the luminescence performance. The influences of Sm doping and Sm/A codoping on the crystal structure and the luminescence performance of the CPSO:Sm phosphor were investigated in detail. The X-ray diffraction results exhibited that all the as-prepared samples were assigned to the standard structure Ca(PO)SiO possessing the 63/ space group. Upon near-ultraviolet excitation at 401 nm, the characteristic emission peaks of the CPSO:Sm phosphors are located at 558 nm, 605 nm and 656 nm, respectively, which are derived from the G → H ( = 5/2, 7/2, and 9/2) electron transitions of Sm ions. Furthermore, a significant luminescence improvement of the CPSO:Sm phosphor was attained through charge compensation of codoped A ions, and the emission intensity is enhanced by 1.79-, 1.45-, and 1.14-fold for K, Na, and Li, respectively. In addition, the actual orange-red LED and w-LED fabricated with the as-prepared CPSO:Sm,K phosphor showed excellent optical performance. All the results demonstrated that the CPSO:Sm,K orange-emitting phosphor could act as a potential orange-red component in the w-LEDs illumination field.
采用简单的固相法制备了发射橙色光的Ca(PO)SiO:Sm（CPSO:Sm）荧光粉，并将电荷补偿剂A（A = Li、Na和K）共掺杂到CPSO:Sm中以改善发光性能。详细研究了Sm掺杂和Sm/A共掺杂对CPSO:Sm荧光粉晶体结构和发光性能的影响。X射线衍射结果表明，所有制备的样品均归属于具有63/空间群的标准结构Ca(PO)SiO。在401 nm的近紫外激发下，CPSO:Sm荧光粉的特征发射峰分别位于558 nm、605 nm和656 nm，这源于Sm离子的G→H（J = 5/2、7/2和9/2）电子跃迁。此外，通过共掺杂A离子的电荷补偿实现了CPSO:Sm荧光粉发光的显著改善，对于K、Na和Li，发射强度分别提高了1.79倍、1.45倍和1.14倍。此外，用制备的CPSO:Sm,K荧光粉制作的实际橙红色发光二极管和白光发光二极管表现出优异的光学性能。所有结果表明，CPSO:Sm,K橙色发射荧光粉可作为白光发光二极管照明领域潜在的橙红色组分。
