Abstract
Tb3+/Mn2+ activated Ca3La6(SiO4)6 (CLS) phosphors were prepared by solid-state reaction method, and their photoluminescence and cathodoluminescence (CL) properties were investigated. The CLS:Tb3+ sample shows a yellowish green emission under 377nm excitation, and the excitation spectrum reveals the excitation peaks between 340 and 390nm can match with the near-ultraviolet LED chip. Excellent thermal stability has been obtained in the CLS:Tb3+ phosphor by studying the temperature dependence of the Tb3+ emission intensity. By introducing Mn2+ into CLS:Tb3+, tunable emissions are generated due to the efficient energy transfer from Tb3+ to Mn2+. The CL spectrum of CLS:Tb3+ displays that the characteristic 5D4-7FJ (J=6−3) transitions of Tb3+ are found under electron beam excitation. The above investigation results imply that the CLS:Tb3+, Mn2+ phosphors could have potential applications on LEDs and FEDs.
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