有机-过渡金属配合物的三重态发光问题

The Organic-Transition Metal Complex and the Emission of Triplet States

近年来,随着OLED器件的发展,有关有机-过渡金属配合物的三重态发光问题受到人们广泛的关注。这不仅是与电致发光器件效率的提高相关联,同时也是一个在光物理研究中值得深入研究的课题.文章对有机-金属化合物激发态的能级分裂,以及发光三重态亚态的零场-分裂(ZFS)等进行了讨论,对具不同电子构型中心金属离子,例如八面体结构与平面四方形构型结构等与它们光物理行为间的关系进行了讨论.特别对这类体系的发光三重态在自旋轨道偶合作用(SOC)和构型相互作用(CI)的影响下,导致单重态与三重态的混合和促进从最低三重态到基态的发光跃迁进行了讨论.

In recent years,the emission of triplet state of organic-transition metal complex attracted extensive attentions with the development of OLED devices.It not only concerns with the increase the device efficiency,but also with some problems deeply in the field of photo-physics.In this article,the energy level splitting of organic-metallic compounds,and the zero-field splitting（ZFS） of emissive triplet state are discussed briefly.Simultaneously,the relationship of electronic configuration of centered metallic ions,such as the octahedral and square planar coordination and their photo-physical behaviors are also discussed.Especially,the emission state of these compounds,under the influence of spin-orbital coupling（SOC） and configuration interaction（CI） which can induce the admixture of singlet and triplet state,then to improve the emissive transition from the lowest triplet state to ground state,has also been discussed.