Tunable photoluminescence and magnetic properties of Dy 3+ and Eu 3+ doped GdVO 4 multifunctional phosphors

• Published in: Physical chemistry chemical physics : PCCP Vol. 17; no. 40; pp. 26638 - 26644
• Main Authors: Liu, Yanxia, Liu, Guixia, Dong, Xiangting, Wang, Jinxian, Yu, Wensheng
• Format: Journal Article
• Language: English
• Published: 2015
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/C5CP04373E

A series of Dy 3+ or/and Eu 3+ doped GdVO 4 phosphors were successfully prepared by a simple hydrothermal method and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectrometry (EDS), photoluminescence (PL) spectroscopy and vibrating sample magnetometry (VSM). The results indicate that the as-prepared samples are pure tetragonal phase GdVO 4 , taking on nanoparticles with an average size of 45 nm. Under ultraviolet (UV) light excitation, the individual Dy 3+ or Eu 3+ ion activated GdVO 4 phosphors exhibit excellent emission properties in their respective regions. The mechanism of energy transfer from the VO 4 3− group and the charge transfer band (CTB) to Dy 3+ and Eu 3+ ions is proposed. Color-tunable emissions in GdVO 4 :Dy 3+ ,Eu 3+ phosphors are realized through adopting different excitation wavelengths or adjusting the appropriate concentration of Dy 3+ and Eu 3+ when excited by a single excitation wavelength. In addition, the as-prepared samples show paramagnetic properties at room temperature. This kind of multifunctional color-tunable phosphor has great potential applications in the fields of photoelectronic devices and biomedical sciences.