Skip to main content
Home / Spectroscopy and Spectral Analysis, Volume 31, Number 8

Preparation and Luminescence Characteristics of White-Light Emitting Ca9.95-x Na0.75K0.25(PO4)7:Eu2+ 0.05, Mn2+ x Phosphors

Buy Article:

$28.00 + tax (Refund Policy)

The Ca9.95-x Na0.75K0.25(PO4)7:Eu2+ 0.05, Mn2+ <i>x(x=0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 and 0.7) phosphors were synthesized by high temperature solid-state reaction, and their phase composition and fluorescence emission properties were studied. Due to the existence of double phases with similar crystal structure, the 5d-4f transition of Eu2+ ions in the phosphors emits a fluorescence of wide wavelength with peaks located at 491 nm and 540 nm respectively. The energy transfer between Eu2+ and Mn2+, together with the occupation of Mn2+ ions at the eight coordination sites in the phosphors, makes the 4T1(4G)-6A1(6S) transition of Mn2+ ions eimit red emission peaked at 635 nm. The combination of fluorescence emtted by Mn2+ and Eu2+ ions results in the emission of white light with color coordinates (0.333 5, 0.292 4), (0.399 9, 0.317 9) and (0.330 7, 0.256 4). The nearly pure white light emitting makes the phosphors show great application potential in the white light-emitting LEDs.

Keywords: Energy transfer; Fluorescence; High temperature solid-state reaction; UV excitation; White light emitting LEDs

Document Type: Research Article

Publication date: 01 August 2011

More about this publication?
  • Spectroscopy and Spectral Analysis, founded in 1981, is sponsored by the Chinese Central Iron & Steel Research Institute. "Spectroscopy and Spectral Analysis" has been indexed in SCI(1999), Ei(1992), MEDLINE(1999), and AJ (1999). "Spectroscopy and Spectral Analysis" publishes original contributions on various fields in Spectroscopy, including research results on laser spectroscopy, IR, Ramn, UV/Vis, Optical Emission, Absorption and Fluorescence spectroscopy, X-ray Fluorescence, and Spectrochemical Analysis, as well as Reseach paper, Research notes, Experimental Technique and Instrument, Review and Progress on the latest development of spectroscopy and spectrochemical anlysis, etc. "Spectroscopy and Spectral Analysis" is published monthly by Peking University Press with book sizes of large 16-mo format , and 292 pages per issue.
  • Editorial Board
  • Submit a Paper
  • Ingenta Connect is not responsible for the content or availability of external websites

Share Content

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content