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量子限制斯塔克效应
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量子限制斯塔克效应
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quantum confined Stark effect
量子限制斯塔克效应
量子限制斯塔克效应主要出现在量子阱中。当量子阱中出现附加的外电场,电子在电场作用下,能量降低,而空穴在电场作用下,能量升高。这使得电子和空穴的有效势能差降低,产生复合发光或吸收波长变长,表现为红移。另外,由于外电场作用,电子和空穴波函数沿电场的相反方向移动,导致电子和空穴的交叠概率变低,即导致电子或空穴复合发光或吸收的概率低,宏观表现为发光或吸收效率变低。但由于电子和空穴受到量子阱的限制作用,这种红移和降低限制在一定程度,这种效应即量子限制的斯塔克效应(QCSE)。
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