红色铱配合物磷光材料及器件的研究进展

有机电致发光器件具有驱动电压低、高亮度、高效率等优点,引起了研究人员的广泛关注,在固态照明和平板显示领域具有广阔应用前景。在绿、蓝、红三基色器件中,绿光器件和蓝光器件的性能普遍优于红光器件,基本满足了产业化的需要;目前红色有机电致发光材料及器件的研究进展相对缓慢。因为红光材料的能隙较窄,致使主客体材料之间能级匹配困难,导致红光器件普遍效率低、色纯度差,但是,红光材料是获得白光器件必不可少的材料。因此,如何获得高性能红光材料对于有机电致发光器件的发展至关重要。本文综述了近年来红色铱配合物磷光材料及器件的研究进展,对提升效率和色纯度的方法进行重点阐述;并结合现有工作,对红色有机电致磷光材料与器件的前景进行展望。

Research Progress on Red Iridium Complexes Phosphorescent Materials and Devices

Organic light-emitting devices that are widely used in solid-state lighting and flat panel display have attracted the attention of researchers because of their advantages such as low voltage, high brightness and high efficiency. Among three primary colors devices, the performances of green and blue organic light-emitting devices are generally higher than those of red devices and basically satisfy the requirements of practical application. Due to the narrow energy gap, it is difficult to realize the matched energy levels between red light-emitting materials and host materials, thus causing the low efficiency and color purity of red devices. In addition, red light-emitting materials are necessary for the realization of white organic light-emitting devices. Therefore, how to realize high performance red light-emitting materials is very important for the development of organic light-emitting devices. Herein we reviewed the recent progress of red iridium complexes phosphorescent materials and devices, especially the strategies of enhancing efficiency and color purity.