Blue and green emissions with high color purity from nanocrystalline Ca2Gd8Si6O26:Ln (Ln = Tm or Er) phosphors

G. Seeta Rama Raju, Jin Young Park, Hong Chae Jung, E. Pavitra, Byung Kee Moon, Jung Hyun Jeong, Jae Su Yu, Jung Hwan Kim, Haeyoung Choi

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Blue and green light emissive nanocrystalline Ca2Gd 8Si6O26 (CGS):Tm3+ and CGS:Er 3+ phosphors with high color purity were prepared by solvothermal reaction method. The structural and morphological properties of these phosphors were evaluated by the powder X-ray diffraction (XRD) and scanning electron microscopy, respectively. From the XRD results, Tm3+:CGS and Er 3+:CGS phosphors had the characteristic peaks of oxyapatite in the hexagonal lattice structure. The visible luminescence properties of phosphors were obtained by ultraviolet (UV) or near-UV light and low voltage electron beam (0.5-5 kV) excitation. The photoluminescence and cathodoluminescence properties were investigated by changing the variation of Tm3+ or Er 3+ concentrations and the acceleration voltage, respectively. The CGS:Tm3+ phosphors exhibited the blue emission due to 1D23F4 transition, while the CGS:Er3+ phosphors showed the green emission due to 4S3/24I15/2 transition. The color purity and chromaticity coordinates of the fabricated phosphors are comparable to or better than those of standard phosphors for lighting or imaging devices.

Original languageEnglish
Pages (from-to)7537-7542
Number of pages6
JournalJournal of Alloys and Compounds
Volume509
Issue number27
DOIs
StatePublished - 7 Jul 2011

Keywords

  • Cathodoluminescence
  • High color purity blue and green emissions
  • Nanocrystalline CaGdSiO
  • Photoluminescence
  • Solvothermal synthesis

Fingerprint

Dive into the research topics of 'Blue and green emissions with high color purity from nanocrystalline Ca2Gd8Si6O26:Ln (Ln = Tm or Er) phosphors'. Together they form a unique fingerprint.

Cite this