title: Yellow-emitting γ-Ca2SiO4:Ce3+, Li+ phosphor for solid-state lighting: luminescent properties, electronic structure, and white light-emitting diode application.
abstract: A new yellow-emitting γ-Ca2SiO4:Ce3+,Li+ phosphor was synthesized via a solid-state reaction. The phosphor showed a strong yellow emission with a wide bandwidth of 135.4 nm under blue light excitation. Absorption and photoluminescence measurements and density functional theory calculations suggest that the luminescence of the phosphor can be attributed primarily to the transitions of 5d→4f (2F(7/2) and 2F(5/2)) of Ce3+ ions occupying Ca(1) sites in the host crystal. White light-emitting diodes (LEDs) were fabricated by combining this phosphor with a blue LED, and excellent white light with a high color rendering index of 86 was created owing to the wide emission bandwidth of the phosphor.
authors.affiliation: Department of Materials Science and Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, South Korea.
authors.forename: Ho Seong
authors.initials: HS
authors.lastname: Jang
authors.forename: Hyun You
authors.initials: HY
authors.lastname: Kim
authors.forename: Yang-Soo
authors.initials: YS
authors.lastname: Kim
authors.forename: Hyuck Mo
authors.initials: HM
authors.lastname: Lee
authors.forename: Duk Young
authors.initials: DY
authors.lastname: Jeon
mesh_terms: D003116:Color; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation*; D012666:Semiconductors