TY - JOUR
T1 - Synthesis and long-period phosphorescence of ZnGa2O4:Mn2+ spinel
AU - Uheda, Kyota
AU - Maruyama, Takuya
AU - Takizawa, Hirotsugu
AU - Endo, Tadashi
N1 - Funding Information:
The authors wish to thank Dr T. Hase of Kasei Optonics Co. Ltd. for fruitful discussions. This work was supported in part by a Gra~lt-in-Aid for Scientitic Research on Priority Areas "Physics and Chemistry of Functionally Graded Materials' of the Ministry of Education, Science and Culture.
PY - 1997/11/14
Y1 - 1997/11/14
N2 - Novel long-period phosphor ZnGa2O4:Mn2+ was prepared by a conventional solid reaction of ZnO, Ga2O3 and Mn(NO3)2 under conditions of > 1000°C for 24 h in flowing Ar gas. The phosphor had green intense emission peaking at 503.6 nm. The improvement of emission intensity was brought out by the higher temperature processing. This implied that long lifetime phosphorescence was closely related to the formation of vacancies at the Zn2+ sites of the host lattice. The carrier trap level was positioned at 0.71 eV higher than the valence band of host lattice. The possible mechanism for prolonging the emission for a long time was discussed.
AB - Novel long-period phosphor ZnGa2O4:Mn2+ was prepared by a conventional solid reaction of ZnO, Ga2O3 and Mn(NO3)2 under conditions of > 1000°C for 24 h in flowing Ar gas. The phosphor had green intense emission peaking at 503.6 nm. The improvement of emission intensity was brought out by the higher temperature processing. This implied that long lifetime phosphorescence was closely related to the formation of vacancies at the Zn2+ sites of the host lattice. The carrier trap level was positioned at 0.71 eV higher than the valence band of host lattice. The possible mechanism for prolonging the emission for a long time was discussed.
KW - Green intense emission
KW - Long-period phosphorescence
KW - Manganese-activated phosphor
KW - Non-stoichiometric spinel
KW - Zinc gallates
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U2 - 10.1016/S0925-8388(97)00329-0
DO - 10.1016/S0925-8388(97)00329-0
M3 - Article
AN - SCOPUS:0031275605
VL - 262-263
SP - 60
EP - 64
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -