title: Formation condition of red Ce3+ in Ca3Sc2Si3O12:Ce3+, N3- as a full-color-emitting light-emitting diode phosphor.
abstract: In this Letter, we study diffuse reflectance and photoluminescence spectra for O(2-) fully coordinated green-emitting Ce(3+) and N(3-) partially coordinated red Ce(3+) in Ca(3)Sc(2)Si(3)O(12)(CSS):Ce(3+), N(3-) as a function of CeO(2) and Si(3)N(4) contents in the raw material. Our results indicate that the presence of N(3-) can enhance Ce(3+) solubility in the form of red centers in CSS. At low Ce(3+) concentration, green Ce(3+) forms preferentially while red Ce(3+) hardly forms even if N(3-) content in the raw material is sufficient. There exists a threshold concentration of green Ce(3+); only beyond that can color tunable luminescence with enriched red emission be achieved. Energy transfer from green Ce(3+) to red Ce(3+) is also studied, as only the green Ce(3+) is excited by blue light.
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Qiao
authors.forename: Jiahua
authors.initials: J
authors.lastname: Zhang
authors.forename: Xia
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhendong
authors.initials: Z
authors.lastname: Hao
authors.forename: Wenyuan
authors.initials: W
authors.lastname: Deng
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Liu
authors.forename: Liangliang
authors.initials: L
authors.lastname: Zhang
authors.forename: Ligong
authors.initials: L
authors.lastname: Zhang
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhao
authors.forename: Jian
authors.initials: J
authors.lastname: Lin