Abstract
Li1.0Nb0.6Ti0.5O3:3 wt% Eu3+ red phosphor was synthesized by sol-gel method. The influences of the pH value and the citric acid(CA)/metal cations(M) ratio on the luminescent properties of the samples were discussed. The properties of the samples were characterized by x-ray diffraction (XRD) and photoluminescence spectroscopy, respectively. The results showed that the samples were consist of ‘M- phase’. Under the 466 nm excitation, the orange emission at 592 nm and the red emission at 612 nm could be observed. The emission intensity increased with the increasing of pH value firstly and then decreased. The optimum pH value was 5.5. Moreover, the emission intensity decreased with the increasing of CA/M ratio. The relatively high emission intensity of the sample could be obtained when the CA/M was 3:1. Emission spectra and CIE coordinate of Li1.0Nb0.6Ti0.5O3:3 wt% Eu3+ were superior to commercial red phosphor Y2O3:Eu3+, which showed the red phosphor could have potential application in the White-LED field.
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