Journal of the American Ceramic Society, Vol.95, No.4, 1208-1211, 2012
Combined White Luminescence from Eu3+, ML-Ag Particles and Ag+ in Ag-Eu3+ Co-Doped H3BO3-BaF2 Glasses
Luminescent properties of Ag-Eu3+ co-doped 80H(3)BO(3)-20BaF(2) glasses prepared by melt-quenching technique at relatively low temperature (1000 degrees C) were characterized by absorption, excitation, emission spectra, and lifetime measurements systematically. A white emission (X = 0.373, Y = 0.334) has emerged by combining red, green, and blue emissions that originated from Eu3+, very small molecule-like, nonplamonic Ag particles (ML-Ag) and Ag+, respectively. Under nonresonant excitation (310-370 nm), Eu3+ emission was enhanced significantly by 60 times. Our results suggest that Ag-Eu3+ co-doped H3BO3-BaF2 glasses could be potentially applied as white phosphors in white light emitting diodes.