Header menu link for other important links
X
SrS:Ce/ZnS:Mn-A di-band phosphor for near-UV and blue LED-converted white-light emitting diodes
Published in
2009
Volume: 129
   
Issue: 9
Pages: 991 - 995
Abstract
The SrS:Ce/ZnS:Mn phosphor blends with various combination viz 75:25, 50:50 and 25:75 were assign to generate the white-light emission using near-UV and blue-light emitting diodes (LED) as an excitation source. The SrS:Ce exhibits strong absorption at 427 nm and the corresponding intense emission occurs at 480 and 540 nm due to electron transition from 5d(2D)-4f(2F5/2, 7/2) of Ce3+ ion as a result of spin-orbit coupling. The ZnS:Mn excited under same wavelength shows broad emission band with λmax=582 nm originates due to 3d (4G-6S) level of Mn2+. Photoluminescence studies of phosphor blend excited using near-UV to blue light confirms the emitted radiation varies from cool to warm white light in the range 430-600 nm, applicable to LED lightings. The CIE chromaticity coordinate values measured using SrS:Ce/ZnS:Mn phosphor blend-coated 430 nm LED pumped phosphors in the ratio 75:25, 50:50 and 25:75 are found to be (0.235, 0.125), (0.280, 0.190) and (0.285, 0.250), respectively. © 2009 Elsevier B.V. All rights reserved.
About the journal
JournalJournal of Luminescence
ISSN00222313
Open AccessNo
Concepts (33)
  •  related image
    BLUE LEDS
  •  related image
    BLUE LIGHT
  •  related image
    BROAD EMISSION BANDS
  •  related image
    Cie chromaticity
  •  related image
    EMITTED RADIATION
  •  related image
    Excitation sources
  •  related image
    INTENSE EMISSION
  •  related image
    LED LIGHTING
  •  related image
    OPTICAL ABSORPTION SPECTRA
  •  related image
    PHOSPHOR BLENDS
  •  related image
    PROPERTIES AND MATERIALS
  •  related image
    SPIN-ORBIT COUPLING
  •  related image
    Spin-orbit couplings
  •  related image
    Uv- and
  •  related image
    White light
  •  related image
    White light emission
  •  related image
    Absorption
  •  related image
    Cerium
  •  related image
    CERIUM COMPOUNDS
  •  related image
    Emission spectroscopy
  •  related image
    Light absorption
  •  related image
    Light emission
  •  related image
    Manganese
  •  related image
    Manganese compounds
  •  related image
    Materials properties
  •  related image
    Optical materials
  •  related image
    Orbits
  •  related image
    Phosphors
  •  related image
    Photoluminescence
  •  related image
    Spectrum analysis
  •  related image
    Spin dynamics
  •  related image
    Zinc sulfide
  •  related image
    Light emitting diodes