title: Luminescence enhancement of (Sr1-xMx)2SiO4:Eu2+phosphors with M (Ca2+/Zn2+) partial substitution for white light-emitting diodes.
abstract: Eu2+-doped Sr2SiO4phosphor with Ca2+/Zn2+substitution, (Sr1-xMx)2SiO4:Eu2+(M = Ca, Zn), was prepared using a high-temperature solid-state reaction method. The structure and luminescence properties of Ca2+/Zn2+partially substituted Sr2SiO4:Eu2+phosphors were investigated in detail. With Ca2+or Zn2+added to the silicate host, the crystal phase could be transformed between the α-form and the β-form of the Sr2SiO4structure. Under UV excitation at 367 nm, all samples exhibit a broad band emission from 420 to 680 nm due to the 4f65d1→ 4f7transition of Eu2+ions. The broad emission band consists of two peaks at 482 and 547 nm, which correspond to Eu2+ions occupying the ten-fold oxygen-coordinated Sr.(I) site and the nine-fold oxygen-coordinated Sr.(II) site, respectively. The luminescence properties, including the intensity and lifetime of Sr2SiO4:Eu2+phosphors, improved remarkably on Ca2+/Zn2+addition, and promote its application in white light-emitting diodes. Copyright © 2016 John Wiley & Sons, Ltd.
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China.|Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu, 610059, China.
authors.forename: Wentao
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China.|Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu, 610059, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Long
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
mesh_terms: D002118:Calcium / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D008027:Light; D049449:Luminescence; D017640:Silicates / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D017640:Silicates; D005063:Europium; D015032:Zinc; D002118:Calcium; D013324:Strontium
keywords: Sr2SiO4:Eu2+; cation substitution; photoluminescence; solid-state reaction; white LEDs