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ZnS:Mn 薄膜电致发光器件的效率基本上依赖于激发或亮度。除在高频下会使性能降低之外,这一点对多路传输显示器并无不利影响。可能是由于掺杂剂 Mn~(2+)的双激发造成性能的降低。在 Mn~(2+)系统中,离子中的一部分上升到基态之上4.2eV 的~4A_2(4F)能级。对粉末、单晶及薄膜的光致发光研究结果表明,用染料激光器激发后,上述材料都呈现衰减的初始部分,这表明了激发的陡化。这种效应可以用常规的浓度猝灭附加交叉驰豫的蒙特一卡洛模型来解释。已经发现 EL 器件的效率不仅取决于亮度,而且与 Mn~(2+)有密切关系.
The efficiency of a ZnS: Mn thin film electroluminescent device basically depends on the excitation or the brightness. This will not adversely affect the multiplexed display, except at lower frequencies, which will degrade performance. It may be due to the double excitation of dopant Mn ~ (2+) resulting in the decrease of performance. In the Mn 2+ system, some of the ions rise to the ~ 4A_2 (4F) level of 4.2 eV above the ground state. The results of photoluminescence studies on powders, single crystals and thin films show that the above materials all exhibit the initial decay after excitation with a dye laser, indicating a steep excitation. This effect can be explained by the conventional concentration-quenching Monte Carlo model with additional cross-relaxation. It has been found that the efficiency of an EL device depends not only on the brightness but also on the Mn 2+.