Abstract
Novel phosphors CaB6O10:RE3+ (RE=Ce, Tb, Dy, Eu) were successfully developed by solid-state reaction method. Spectroscopic properties of CaB6O10:RE3+ (RE=Ce, Tb, Dy, Eu) under ultraviolet (UV) light excitation were investigated. Under UV excitation, CaB6O10:Ce3+, CaB6O10:Tb3+, CaB6O10:Dy3+ phosphors show strong blue, green and yellowish-white emission, respectively. The CaB6O10:Eu3+ phosphor shows a bright red emission, and the integral emission intensity of CaB6O10:0.2Eu3+ is 4.31 times of the Y2O3:Eu3+ under 392nm excitation. In addition, CaB6O10: 0.2Eu3+ has a better red color purity with CIE (0.658, 0.342) and similar thermostability with Y2O3:Eu3+ under UV excitation. These results show that CaB6O10:RE3+ could be promising phosphors for light emitting diodes.
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