Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5400101 | Journal of Luminescence | 2013 | 6 Pages |
Abstract
Novel Ca3WO6:Eu3+ phosphor has been synthesized with different Eu3+ doping concentrations through the solid-state reaction method, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra and decay curve. The results of XRD and SEM show that all Ca3WO6:Eu3+ samples are single phase and have irregular morphology. In the excitation spectrum of Ca3WO6:Eu3+ phosphor, the broad excitation band centering at 310Â nm is due to the combination of charge transfer from Eu3+ to O2â and W6+ to O2â. The intense red emission can be obtained under excitation into the 5D2 state with 465Â nm, which corresponds to the emission wavelength from blue light-emitting diodes (LEDs). The co-doped effect of alkali-metal ions (Li+, Na+, and K+) on the luminescence behavior of Eu3+-doped Ca3WO6 has been discussed in this paper. The luminescence properties suggest that novel Ca3WO6:Eu3+ phosphor may be a potential red phosphor for white LEDs.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Shaoan Zhang, Yihua Hu, Li Chen, Xiaojuan Wang, Guifang Ju, Yan Fan,