Study on Photoluminescence of Mn2+ in Zn0.83Mn0.17Se and ZnSe/Zn0.84Mn0.16Se Superlattics under Pressures
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摘要: 采用压力光谱技术在低温下观测到了Mn2+离子的4T16A1跃迁,该谱线在Zn0.83Mn0.17Se和ZnSe/Zn0.84Mn0.16Se超晶格样品中有不同的压力行为,体材料中其压力系数为-42.4 peV/Pa,超晶格中为-29.5 peV/Pa。用晶体场理论计算得到体材料Zn0.83Mn0.17Se中Mn2+离子4T16A1谱线的压力系数为-38.3 peV/Pa,与实验结果基本一致。结合材料中发光峰积分强度随压力的变化关系进行分析,证实Mn2+离子的发光性质主要与其近邻的晶体场环境有关。
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关键词:
- ZnSe/Zn0.84Mn0.16Se /
- 压力光谱 /
- Mn2+的发光性质
Abstract: The photoluminescence of Mn2+ in Zn0.83Mn0.17Se and ZnSe/Zn0.84Mn0.16Se superlattics was investigated at different pressures. The 4T16A1 transition of Mn2+, which shows different pressure dependence in bulk materials and superlattics, was observed. The pressure coefficients obtained from them are -42.4 and -29.5 peV/Pa, respectively. The theoretical calculation for pressure coefficient of the emissions in Zn0.83Mn0.17Se gave the result -38.3 peV/Pa, which is almost consistent with experiment. Further analysis of pressure dependence for emission intensity confirms that the emission characteristic of Mn2+ was mainly affected by near crystal field. Their different properties mainly root in different band structures and strains in ZnSe/Zn0.84Mn0.16Se superlattics.-
Key words:
- ZnSe/Zn0.84Mn0.16Se /
- pressure spectrum /
- photoluminescence of Mn2+
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