Luminescent characteristics of LiCaBo3:M (M = Eu3+, Sm3+, Tb3+, Ce3+, Dy3+) phosphor for white LED

LiCaBO3:M (M = Eu3+, Sm3+, Tb3+, Ce3+, Dy3+) phosphors were synthesized by a normal solid-state reaction using CaCO3, H3BO3, Li2CO3, Na2CO3, K2CO3, Eu2O3, Sm2O3, Tb4O7, CeO2 and Dy2O3 as starting materials. The emission and excitation spectra were measured by a SHIMADZU RF-540 UV spectrophotometer. And the results show that these phosphors can be excited effectively by near-ultraviolet light-emitting diodes (UVLED), and emit red, green and blue light. Consequently, these phosphors are promising phosphors for white light-emitting diodes (LEDs). Under the condition of doping charge compensation Li+, Na+ and K+, the luminescence intensities of these phosphors were increased. (C) 2009 Elsevier B.V. All rights reserved.