有机金属配合物电子传输材料

Metal-Organic Complex Electron-Transporting Materials

电子传输材料在OLED(organic light emitting diode)中起着极为重要的作用,电子迁移率高的传输材料可以使器件的电子与空穴注入大致平衡,从而增加激子形成的概率,减少器件中由于空穴数量过剩导致空穴通过器件内部传输到阴极而形成的漏电流,提高器件发光亮度和效率。本文概述了有机金属配合物电子传输材料的进展,以金属中心离子来划分有机金属配合物电子传输材料的种类,分别介绍了主族的Al、Be等,副族的Cu、Zn等以及稀土金属为中心离子的电子传输材料;并展望了金属配合物电子传输材料的发展前景。

Organic light emitting diode（OLED） has been the subject of intense research in the past decades because of its potential applications for large area flat panel displays and solid state lighting.One of the important challenges on the path to developing the high-performance OLED is the design and synthesis of the readily processible and thermally robust charge transport materials.Because a high electron-mobility material can adjust the balance of the injection of electrons and holes and increase the probability of excitons’formation,which can reduce the leakage current in the device caused by excess holes penetrating through from anode to cathode,then enhance the luminescence and efficiency of OLED.Many metal organic complexs not only have a high flourescence quantum efficiency,but also have many others merits,such as stability and easily conjoint with the electrode.So they can be used as electron transporting materials and luminescent materials.In this paper we report the recent progress of metal-organic complex as electron-transporting materials in electroluminescent,which are divided by the central metal ions,such as the main group metals of Al,Be,etc.,the sub group metals of Cu,Zn,etc.and the rare-earth metals,respectively.The potential developments of metal-organic complex electron-transporting materials are also prospected.