Manganese‐activated luminescence in ZnGa2O4
Manganese‐activated luminescence in ZnGa2O4
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DOI：
10.1063/1.361435
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发表时间：
1996-05
影响因子：
3.2
通讯作者：
Chang-Feng Yu;P. Lin
中科院分区：
文献类型：
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作者：
Chang-Feng Yu;P. Lin
在1375℃的烧结温度下，添加0.1%的MnO掺杂制备了锰活化的ZnGa2O4，在325 nm的激光源激发下，ZnGa2O4发出的红光和绿光分别为666和508 nm。在尖晶石结构的没食子酸锌的八面体(B)位上发现了Mn4+离子的发光中心。在这两个峰上监测，样品在氙放电灯的辐射激发下显示出342和464 nm（红色）和245和290 nm（绿色）的吸收带，表明Mn4+离子发生的激发过程不同于Mn2+离子（在a位），这是已知的绿色发射的原因。阴极发光光谱表明，紫外波段（峰值在349 nm处）的综合强度随光束电流的增加而稳定增加，而绿光强度在高电流范围内达到饱和。讨论了几种可能的饱和机理。强度随电流的变化被解释和表述为基于一个…
Manganese‐activated ZnGa2O4, prepared at a sintering temperature of 1375 °C with 0.1% MnO dopant, emitted red and green light with peaks at 666 and 508 nm when excited with a laser source (325 nm). The luminescence centers of red emission were ascribed to Mn4+ ions in the octahedral (B) sites of spinel‐structure zinc gallate. Monitored at these two peaks, the sample exhibited absorption bands at 342 and 464 nm (for red) and 245 and 290 nm (for green) when excited with radiation from a xenon discharge lamp, indicating an excitation process occurring in Mn4+ ions distinct from that of Mn2+ ions (in A sites) which were known to be responsible for the green emission. Cathodoluminescence spectra showed that the integrated intensity of an UV band (peak at 349 nm) increased steadily with beam current while the green light intensity saturated at high current ranges. Several possible saturation mechanisms were discussed. The variation of the intensities versus current was interpreted and formulated based on an ene...