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Generation Of Broadband Emission By Incorporating N3- Into Ca3Sc2Si3O12:Ce3+ Garnet For High Rendering White Leds, Yongfu Liu, Xia Zhang, Zhendong Hao, Xiao-Jun Wang, Jiahua Zhang

Department of Physics and Astronomy Faculty Publications

Adding Si₃N₄ into green emitting Ca₃Sc₂Si₃O₁₂:Ce³⁺ garnet phosphor generates an additionally red emission band peaking around 610 nm that are assigned to Ce³⁺ ions having N³⁻ in their local coordination. The excitation spectrum of the red band consists of not only a distinct band at 510 nm of itself but also an intense blue band at 450 nm that belongs to the typical Ce³⁺ ions with green emission, indicating a notable energy transfer from the green emitting Ce³⁺ ions to the red ones. The …