Zhang Xinguo, Zhou Fangxiang, He Pei, Zhang Min, Gong Menglian
School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
Luminescence. 2016 Feb;31(1):264-9. doi: 10.1002/bio.2956. Epub 2015 Jun 21.
Eu(3+)-activated Y(P,V)O4 phosphors were prepared by the EDTA sol-gel method, and the corresponding morphologies and luminescent properties were investigated. The sample particles were relatively spheroid with size of 2-3 µm and had a smooth surface. The excitation spectra for Y(P,V)O4:Eu(3+) consisted of three strong excitation bands in the 200-350 nm range, which were attributed to a Eu(3+)- O(2-) charge-transfer band and (1)A1-(1) T1/(1) T2 transitions in VO4(3-). The as-synthesized phosphors exhibited a highly efficient red luminescence at 613 nm due to the Eu(3+5) D0-(7) F2 electric dipole transition. With the increase in the V(5+)/P(5+) ratio, the luminescence intensity of the red phosphor under UV excitation was greatly improved due to enhanced VO4(3-) → Eu(3+) energy transfer.
采用乙二胺四乙酸溶胶 - 凝胶法制备了铕（Ⅲ）激活的钇钒磷（Y(P,V)O4）荧光粉，并对其相应的形貌和发光性能进行了研究。样品颗粒相对呈球形，尺寸为2 - 3微米，表面光滑。Y(P,V)O4:Eu(3+)的激发光谱在200 - 350纳米范围内由三个强激发带组成，这归因于Eu(3+) - O(2-)电荷转移带以及VO4(3-)中(1)A1-(1)T1/(1)T2跃迁。由于Eu(3+5)D0-(7)F2电偶极跃迁，合成的荧光粉在613纳米处呈现出高效的红色发光。随着V(5+)/P(5+)比例的增加，由于VO4(3-)→Eu(3+)能量转移增强，紫外激发下红色荧光粉的发光强度得到极大提高。
