Synthesis and long-period phosphorescence of ZnGa2O4:Mn2+ spinel

被引：51

作者：

Uheda, K ^{[1
]}

Maruyama, T ^{[1
]}

Takizawa, H ^{[1
]}

Endo, T ^{[1
]}

机构：

[1] Tohoku Univ, Fac Engn, Dept Mol Chem & Engn, Aoba Ku, Sendai, Miyagi 98077, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1997年 / 262卷

关键词：

long-period phosphorescence; zinc gallates; non-stoichiometric spinel; manganese-activated phosphor; green intense emission;

D O I：

10.1016/S0925-8388(97)00329-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel long-period phosphor ZnGa2O4:Mn2+ was prepared by a conventional solid reaction of ZnO, Ga2O3 and Mn(NO3)(2) under conditions of > 1000 degrees 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. (C) 1997 Elsevier Science S.A.

引用

页码：60 / 64

页数：5