Natarajan V.Dhobale A.R.Lu C-H2019-05-132019-05-13200900222313https://scholars.lib.ntu.edu.tw/handle/123456789/407439Yttrium vanadate phosphors co-doped with Bi3+- and Sm3+ ions have been prepared via the solid-state reaction as well as via the sol-gel method. The luminescence studies demonstrate the potential of the prepared phosphors as multi-color emitters, which can be achieved by adjusting the excitation wavelengths. The excitation spectra of Bi3+- and Sm3+ co-doped phosphors clearly revealed energy transfer from Bi3+ to Sm3+ ions. When the co-doped phosphors were excited at 254 nm, the emission from Bi3+ was dominant. Upon excitation at 365 nm, the emission from both Bi3+ and Sm3+ was detected. With 410 nm excitation, Sm3+ ions were selectively excited to yield intense red emission. It is shown that the prepared phosphors with optimal concentrations of Bi3+ and Sm3+ can be excited at 254, 365 and 410 nm to yield yellow, orange and red emissions, respectively. ? 2008.Optical propertiesPhosphorsPhotoluminescenceSol-Gel[SDGs]SDG7journal article10.1016/j.jlumin.2008.10.0012-s2.0-58049113213https://www.scopus.com/inward/record.uri?eid=2-s2.0-58049113213&doi=10.1016%2fj.jlumin.2008.10.001&partnerID=40&md5=af2d0f794e41118d6afb37f86f271daf