Photoluminescence properties of novel white phosphor of Dy3+-doped LaBSiO5 glass

A single-phased white emitting phosphor LaBSiO5:Dy3+ was successfully synthesized via a solid state reaction. The X-ray diffraction results confirmed that the doped Dy3+ ions did not change the lattice structure. Several strong excitation peaks of LaBSiO5:Dy3+ were found around 300–450 nm. Under excitation of 350 nm, the LaBSiO5:Dy3+ exhibited white emission by combining the two emission peaks at 478 and 574 nm corresponding to the typical 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions. The optimal substitution proportions of Dy3+ for La3+ was determined to be 1 mol% and the critical distance of Dy3+ was 25.9628 Å. Moreover, the CIE chromaticity coordinates of LaBSiO5:Dy3+ phosphor was (0.3116, 0.3474) which is close to the ideal white light coordinates (0.333, 0.333), indicating that the phosphor has a potential application as a single component ultraviolet-convertible white light emitting phosphor.