Investigations on photoluminescence and cathodoluminescence properties of Ca3La6(SiO4)6:Tb3 +, Mn2 +

• The CLS:Tb3 +, Mn2 + phosphors could have potential application in white LEDs.
• The CLS:Tb3 + phosphor exhibits an excellent thermal stability.
• Tunable emission has been obtained in the CLS:Tb3 +, Mn2 + phosphors.
• The CLS:Tb3 + could be efficiently excited by electron beam.

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 377 nm excitation, and the excitation spectrum reveals the excitation peaks between 340 and 390 nm 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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