Continuous zircon-type tetragonal YxBi0.95-xVO4:0.05Dy3+ solid solution: synthesis, characterization, and optical properties

Abstract

We synthesize continuous solid solutions with monophasic zircon-type structure of vanadates of formula Y x Bi 0.95-x VO 4 :0.05Dy 3+ (x = 0-0.95) using a combined method of co-precipitation and hydrothermal synthesis. The X-ray diffractometer patterns confirm the formation of a solid solution of Y x Bi 0.95-x VO 4 :0.05Dy 3+ , and the results show that all the samples have monophasic zircon-type structure. The absorption spectra of the prepared phosphors show a blue-shift of the fundamental absorption band edge with increasing Y 3+ content. An intense tunable characteristic emission of Dy 3+ is observed with the increasing ratio of Y/Bi. Finally, the mechanism of luminescence of Dy 3+ in the Y x Bi 0.95-x VO 4 :0.05Dy 3+ (x = 0-0.95) solid solution is analyzed and discussed.