Effects of Eu2+ concentration variation and Ce3+ codoping on photoluminescence properties of BaGa2S4 : Eu2+ phosphor

Cited 18 time in webofscience Cited 18 time in scopus
  • Hit : 320
  • Download : 1187
Ba1-x-2yEuxCeyLiyGa2S4 phosphor samples were synthesized by a solid-state reaction method. The lattice parameter of the Ba1-xEuxGa2S4 phosphor samples was linearly decreased from 12.654 to 12.492 angstrom, and the main emission wavelength was shifted from 501 to 530 not with increase of the Eu2+ ion concentration (x) from 0.05 to 0.50. The relative photoluminescence (PL) intensity under 450 not excitation was increased with increase of the x from 0.05 to 0.25 due to the excitation band extended to the longer wavelength. However, when x > 0.30. the PL intensity was decreased due to nonradiative transitions among the Eu2+ ions and the formation of EuGa2S4 impurity phase. The Commission International de l'Eclairge chromaticity coordinates were also largely shifted from the bluish-green emitting region (x = 0.143, y = 0.506) to the green emitting one (y = 2.414, y= 0.658) by increasing the x from 0.05 to 0.50. The energy transfer from the Ce3+ ion to the Eu2+ ion enhanced the PL intensity of the Eu2+ ion emission under near ultraviolet and blue excitation. The PL intensity of the Ba0.900Eu0.050Ce0.025Li0.025Ga2S4 phosphor sample was higher by 24% than that of the Ba0.95Eu0.05Ga2S4 phosphor sample under 450 nm excitation. (c) 2008 The Electrochemical Society.
Publisher
ELECTROCHEMICAL SOC INC
Issue Date
2008
Language
English
Article Type
Article
Keywords

LIGHT-EMITTING-DIODES; LUMINESCENCE PROPERTIES; ENERGY-TRANSFER; YELLOW PHOSPHOR; RED PHOSPHOR; CA

Citation

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.155, no.3, pp.66 - 70

ISSN
0013-4651
DOI
10.1149/1.2825303
URI
http://hdl.handle.net/10203/18201
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
000253472900063.pdf(861.49 kB)Download
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 18 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0