Enhanced red fluorescence in Sr 2Si 1-xGe xO 4:Eu 3+ phosphors by the substitution of Si by Ge for white light emitting diodes
MetadataShow full item record
Eu 3-doped Sr 2Si 1-xGe xO 4 (x=0-1) phosphors have been prepared by the high temperature solid-state reaction method. The luminescent properties of these phosphors were investigated. Red fluorescence of Eu 3 is enhanced gradually in the samples with increasing substitution of Si by Ge upon the excitation of 393 nm light. The intensity is increased by 50% with full substitution of Si by Ge. These results are originated from the structural changes and the phonon energy reduction in the samples due to the substitution of Si by Ge. The CIE chromaticity coordinates of the phosphors vary slightly around (0.62, 0.37) and all are in the red color region. The results indicate that these phosphors could be promising red phosphors for white light emitting diodes. © 2012 Elsevier Ltd.
Showing items related by title, author, creator and subject.
Color Point Tuning by Partial Ba<sup>2+</sup> Substitution of Ca <sup>2+</sup> in (Ca<inf>1-x</inf>Ba<inf>x</inf>)<inf>3</inf>(PO <inf>4</inf>)<inf>2</inf> Phosphor for White Light Emitting DiodesLi, Y.; Yu, H.; Deng, D.; Hua, Y.; Zhao, S.; Jia, Guohua; Wang, H.; Huang, L.; Li, Y.; Li, C.; Xu, S. (2013)A potential phosphor (Ca1-xBax)3(PO 4)2:Eu2+ was synthesized by a solid-state reaction. X-ray diffraction (XRD) analysis confirmed the formation of (Ca 1-xBax)3(PO4)2 crystal phase. With the Ba2+ content increasing, the ...
Werrett, M.; Huff, G.; Muzzioli, S.; Fiorini, V.; Zacchini, S.; Skelton, B.; Maggiore, A.; Malicka, J.; Cocchi, M.; Gordon, K.; Stagni, S.; Massi, Massimiliano (2015)The irreversible reaction of methyl triflate with neutral Re(I) tetrazolato complexes of the type fac-[Re(diim)(CO)3(L)], where diim is either 1,10-phenanthroline or 2,2′-bipyridine and L is a para substituted 5-aryltetrazolate, ...
Paskevicius, Mark; Jepsen, L.; Schouwink, P.; Cerný, R.; Ravnsbæk, D.; Filinchuk, Y.; Dornheim, M.; Besenbacher, F.; Jensen, T. (2017)© The Royal Society of Chemistry 2017.A wide variety of metal borohydrides, MBH4, have been discovered and characterized during the past decade, revealing an extremely rich chemistry including fascinating structural ...