Key Laboratory of Catalysis and Material Science of the State Ethnic Affairs Commission and Ministry of Education, College of Chemistry and Material Science, South-Central University For Nationalities, Wuhan 430074, Hubei, People's Republic of China.
Luminescence. 2011 Sep-Oct;26(5):349-55. doi: 10.1002/bio.1236. Epub 2010 Aug 25.
The novel red-emitting phosphors K(x)Sr(1-2x)MoO₄:Pr³⁺(x) (0.00 ≤ x ≤ 0.04) were prepared by solid-state reaction. The crystallization and particle sizes of samples were investigated by powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). TEM images were in good agreement with the theoretical calculation data from the XRD patterns. Photoluminescence analysis indicated that there were three excitation peaks under 430-500 nm, and all samples showed the intensely red emission at 648 nm corresponding to the ³P₀ → ³F₂ transition of Pr³⁺. The concentrations of doping ions, temperature and polyethylene glycol in the phosphor system can significantly influence the intensity of the red emission. The photoluminescence spectral intensity reached its maximum at x = 0.02. The results showed that the investigated phosphor is a potential red phosphor for white light-emitting diodes.
通过固态反应法制备了新型红色发光荧光粉 K(x)Sr(1-2x)MoO₄:Pr³⁺(x)（0.00 ≤ x ≤ 0.04）。通过粉末 X 射线衍射（XRD）和透射电子显微镜（TEM）研究了样品的结晶和粒径。TEM 图像与 XRD 图谱的理论计算数据吻合良好。光致发光分析表明，在 430-500nm 范围内有三个激发峰，所有样品均在 648nm 处表现出强烈的红色发射，对应于 Pr³⁺的 ³P₀ → ³F₂跃迁。掺杂离子浓度、温度和荧光粉体系中的聚乙二醇会显著影响红色发射的强度。在 x = 0.02 时，光致发光光谱强度达到最大值。结果表明，所研究的荧光粉是一种潜在的用于白光发光二极管的红色荧光粉。
