Publication Date:
2017-04-20
Description:
LiCaAlN 2 :Eu 3+ /Tb 3+ red/green phosphors were successfully prepared by conventional solid-state reaction. The photoluminescence (PL) properties and cathodoluminescence (CL) properties of LiCaAlN 2 :Eu 3+ /Tb 3+ were investigated in detail. The Eu 3+ (Tb 3+ ) doped LiCaAlN 2 shows red (green) emission peaking at 615 nm (550 nm). Monitored at 615 nm (550 nm), it is interesting to found that LiCaAlN 2 :Eu 3+ (LiCaAlN 2 :Tb 3+ ) has a broad charge transfer transition in the range of 350-450 nm (275-375 nm) peaking at 380 nm (343 nm), which can be efficiently excited by n-UV light-emitting diodes (LEDs). Under electron beam excitation, LiCaAlN 2 :Tb 3+ exhibited a good resistance to the current saturation. The white LED has also been fabricated with blue, green, and LiCaAlN 2 :Eu 3+ red phosphor. The results indicate that LiCaAlN 2 :Eu 3+ /Tb 3+ could be conducive to the development of phosphor-converted LEDs and field emission displays (FEDs).
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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