Luminescence Characteristics of Dy3+ Activated LiCaBO3 Phosphor

LiCaBO3 y3+ phosphor was synthesized by solid-state method. LiCaBO3 y3+ phosphor shows several bands peaking at 484, 577 and 668nm. Monitoring at 577nm peak, the excitation spectrum has several bands peaking at 331, 368, 397, 433, 462 and 478nm. The emission spectrum and luminescence intensity of LiCaBO3 y3+ phosphor were investigated by varying Dy3+ concentration. The result shows that the ratio (Y/B) of yellow emission (577nm) to blue emission (484nm) increases with increasing Dy3+ concentration. Moreover, the luminescence intensity firstly increases and then decreases with increasing Dy3+ concentration, and reaches the maximum at 3.00mol% Dy3+. And the concentration quenching mechanism is the d-d interaction by Dexter theory. The emission intensity of LiCaBO3 y3+ phosphor is enhanced with doping Li+, Na+ or K+. The InGaNa2based LiCaBO3 y3+ shows a nice white-emitting, and the CIE chromaticity is (x=0.3001, y=0.3152).