Photoluminescence properties of Sr3(VO4)2, Sr2Y2/3−yEuy(VO4)2 and Sr2Y2/3−zSmz(VO4)2

✍ Scribed by W.L. Zhu; Y.Q. Ma; C. Zhai; K. Yang; X. Zhang; D.D. Wu; G. Li; G.H. Zheng

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 735 KB
• Volume: 33
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2011.01.019

✦ Synopsis

Photoluminescence properties of Sr 3 (VO 4 ) 2 , Sr 2 Y 2/3Ày Eu y (VO 4 ) 2 and Sr 2 Y 2/3Àz Sm z (VO 4 ) 2 (y, z = 0, 0.1, 0.2, and 0.3) samples have been investigated. The self-activated Sr 3 (VO 4 ) 2 sample shows the activation and emission bands due to the charge transfer transition of VO 3À 4 . While Sr 2+ is partially substituted by Y 3+ , Sr 2 Y 2/3 (VO 4 ) 2 can be used as the good host material for Eu 3+ and Sm 3+ activator-ions. The Eu 3+ and Sm 3+ ions doped Sr 2 Y 2/3 (VO 4 ) 2 can be effectively excited by the near UV light with wavelengths of 300 nm, and emit red light around 617 and 604 nm, respectively. Specially, for Sr 2 Y 2/3Ày Eu y (VO 4 ) 2 , Y 3+ substitution quite enhances the emission intensity and quenching concentration of Eu 3+ . For example, Sr 2 Y 0.56 Eu 0.1 (VO 4 ) 2 has higher emission intensity than Sr 2.85 Eu 0.1 (VO 4 ) 2 without Y 3+ , and even much higher than Y 1Àx Eu x VO 4 which has been extensively used. Our results suggest that Sr 2 Y 2/3Ày Eu y (VO 4 ) 2 samples may be good candidate for a new phosphor to convert the UV pump light into visible wavelength bands.