Magnetic field effects on organic electrophosphorescence
Magnetic field effects on organic electrophosphorescence
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DOI：
10.1103/physrevb.70.205303
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发表时间：
2004-11-01
影响因子：
3.7
通讯作者：
Di Marco, P
中科院分区：
文献类型：
--
作者：
Kalinowski, J;Cocchi, M;Di Marco, P
的电致磷光（EPH）的效率被发现增加高达6%的设备的基础上的金属有机磷光体的铱和2%的那些基于铂的金属有机络合物作为外部磁场增加到500 mT。此外，已经观察到这些设备的EPH的场依赖性的差异。我们证明，这些实验结果主要可以理解的塞曼和超精细相互作用的电子位于荧光体分子和空穴位于空穴传输分子，形成相关的电子-空穴对在发光层。这两种荧光粉的场效应的差异是由于它们的分子结构不同所致。
The electrophosphorescence (EPH) efficiency was found to increase by up to 6% for the devices based on a metallo-organic phosphor of iridium and 2% for those based on a metal-organic complex of platinum as an external magnetic field increased to 500 mT. Also, a difference in the field dependence of the EPH for these devices has been observed. We demonstrate that these experimental findings can principally be understood in terms of the Zeeman and hyperfine interactions of electrons located on phosphor molecules and holes located on the hole-transporting molecules, forming correlated electron-hole pairs in the emitting layer. The difference in the field behavior of the effect for the two phosphors results from their different molecular structures.