title: Sol-gel synthesis and luminescent properties of red-emitting Y(P,V)O4:Eu(3+) phosphors.
abstract: 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.
authors.affiliation: 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.
authors.forename: Xinguo
authors.initials: X
authors.lastname: Zhang
authors.affiliation: BYD Industry Co. Ltd., Shenzhen, 518118, China.
authors.forename: Fangxiang
authors.initials: F
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Tobacco Chemistry of Yunnan Province, Research and Development of Center, China Tobacco Yunnan Industrial Co. Ltd., Kunming, 650231, China.
authors.forename: Pei
authors.initials: P
authors.lastname: He
authors.affiliation: School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
authors.forename: Menglian
authors.initials: M
authors.lastname: Gong
mesh_terms: D003116:Color; D004492:Edetic Acid / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D010100:Oxygen / Q000737:chemistry*; D044367:Phase Transition; D015019:Yttrium / Q000737:chemistry*
chemical_list: D005063:Europium; D015019:Yttrium; D004492:Edetic Acid; D010100:Oxygen
keywords: energy transfer; luminescence; phosphor; sol-gel growth; thermogravimetric analysis