TY - JOUR
T1 - Tunable color emission and afterglow in CaGa2S4:Eu2+, Ho3+ phosphor
AU - Guo, Chongfeng
AU - Tang, Qiang
AU - Huang, Dexiu
AU - Zhang, Chunxiang
AU - Su, Qiang
PY - 2007/12/4
Y1 - 2007/12/4
N2 - The tunable color emission and persistent luminescence lifetime in phosphor CaGa2S4: Eu2+, Ho3+ were achieved through the introduction of alkaline earth elements Mg, Sr and Ba, in which the Ca was partially replaced. The duration of the persistent luminescence of the material CaGa2S4: Eu2+, Ho3+ was remarkably shortened as Al was introduced, substituting for Ga. The luminescent properties were investigated via thermo-luminescence (TL) glow curves, phosphorescence spectra and decay time curves. These results show that vast changes in trap levels and charge density takes place with introduction of other alkaline earth elements or Al. Trap depths and the trap density were also evaluated by simple methodologies.
AB - The tunable color emission and persistent luminescence lifetime in phosphor CaGa2S4: Eu2+, Ho3+ were achieved through the introduction of alkaline earth elements Mg, Sr and Ba, in which the Ca was partially replaced. The duration of the persistent luminescence of the material CaGa2S4: Eu2+, Ho3+ was remarkably shortened as Al was introduced, substituting for Ga. The luminescent properties were investigated via thermo-luminescence (TL) glow curves, phosphorescence spectra and decay time curves. These results show that vast changes in trap levels and charge density takes place with introduction of other alkaline earth elements or Al. Trap depths and the trap density were also evaluated by simple methodologies.
KW - A. Chalcogenides
KW - A. Optical materials
KW - D. Luminescence
UR - http://www.scopus.com/inward/record.url?scp=35148893687&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2007.02.023
DO - 10.1016/j.materresbull.2007.02.023
M3 - Article
AN - SCOPUS:35148893687
VL - 42
SP - 2032
EP - 2039
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 12
ER -