Abstract
A series of and co-doped single composition phosphors were synthesized by a solid-state reaction method, and their luminescent properties had also been investigated. and co-doped phosphors showed a blue and orange dual emission under the near-UV light excitation within the wavelength range of , resulting from the transitions of and the forbidden transition of , respectively. The energy transfer from to was investigated and demonstrated to be a resonance-type via a dipole-dipole mechanism with the critical distance of about . The photoluminescence intensity ratio of blue and orange emission could be tuned by adjusting the concentration of and . The potential applications of these dual-emitting phosphors are the alternative blue and orange-emitting light emitting diode (LED) conversion phosphors due to their strong excitation bands in the wavelength range of .
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