多功能蓝光荧光材料研究进展

有机电致发光器件(OLED)被认为是最具竞争力的下一代平板显示器和固态照明光源,而高效蓝光材料的开发是实现OLED商业化的最重要前提之一。蓝光材料固有的高能隙使电荷很难注入到发光材料中,导致蓝光电致发光器件性能较差。为了提高器件效率,可以从器件结构和材料结构两方面进行优化。就材料本身而言,通过改变分子结构,在蓝光材料的结构中引入电荷传输单元,构建多功能蓝光材料,能有效改善电荷的注入和传输。根据分子中引入的功能基团的不同,多功能蓝光荧光材料可分为空穴传输型、电子传输型及双极传输型3种,分别对这3类蓝光材料进行综述,介绍了该领域的最新研究进展。

Recent Progress in Multifunctional Blue Fluorescent Emitters

Organic light-emitting diodes（OLEDs）are competitive candidates for the next gen-eration flat-panel displays and solid state lighting sources. Efficient blue-emitting materials have been one of the most important prerequisites to kick off the commercialization of OLEDs. However the performance of blue light emitting devices is unsatisfactory for the intrinsic wide band-gap of blue light emitting materials,which makes it hard to inject charge into an emitting layer. Device per-formance can be improved by optimizing the construction of device and structure of materials. For the materials,electron-accepting or electron-donating groups can be introduced into blue emitters to construct multifunctional materials. The introduction of charge-transport groups can effectively im-prove the hole/electron injection and transportation. According to the functional group that intro-duced into blue emitters,multifunctional materials can be divided into p-type,n-type,and bipo-lar-type. The progress of blue fluorescent compounds for the three types is reviewed.