Synthesis and luminescence of sub-micron sized Ca3Sc 2Si3O12:Ce green phosphors for white light-emitting diode and field-emission display applications

Yuanhong Liu, Weidong Zhuang, Yunsheng Hu, Wengui Gao, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)

Abstract

Ca3Sc2Si3O12:Ce3+phosphors with sub-micron size were successfully synthesized by a gel-combustion method. The crystal structure and morphology of the phosphors and their photoluminescence were investigated. The results indicate that the pure phase of Ca3Sc2Si3O12can be obtained at 1100 °C of firing temperature. The particles of phosphor are basically spherical in shape with the mean size less than 1 μm. The grain of the phosphor grows up gradually with the increasing of the firing temperature. The excitation spectrum shows a broad and strong absorption band centered around 450 nm, compatible with the excited wavelength of commercial blue light-emitting diode (LED) for white LED lighting. Bright green-emission located at 505 nm is observed and the intensity of the green-emission increases with the increase of firing temperature. Additionally, under low-voltage (2.5 kV) excitation of electron beam, bright green cathodoluminescence (CL) is also observed, which is attributed to the characteristic emission from Ce3+. Our work suggests that Ca3Sc2Si3O12:Ce3+phosphors are promising for both white LED and field-emission display applications.
Original languageEnglish
Pages (from-to)488-492
Number of pages5
JournalJournal of Alloys and Compounds
Volume504
Issue number2
DOIs
Publication statusPublished - 20 Aug 2010

Keywords

  • FED
  • Green-emitting phosphors
  • Luminescence
  • Rare earths
  • White LED

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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