蓝色荧光小分子电致发光材料

Small Organic Molecules for Blue Electroluminescence

有机电致发光器件(OLED)虽然已于1997年开始商品化,但是目前就全色显示来说,蓝色发光材料研究相对比较薄弱,故开发高效且色纯度高的深蓝光材料已成为本领域的一个亟待解决的课题。蓝色磷光材料在色纯度以及稳定性方面离实用化还有一定距离,但是蓝色荧光方面已经有较多十分接近目标的工作发表。在这些材料之中,蒽以及螺芴的衍生物在材料的热稳定性及色纯度方面表现出了强大的优势,而含氮化合物的特殊电子结构,可以有效地提高材料的荧光量子效率。根据分子结构,把蓝色荧光材料分为芳香烃类、含氮原子类和含其他杂原子类材料等。分析了各种蓝色荧光材料的研究现状,并对OLED蓝色荧光材料的发展趋势进行了评述和展望。

Although organic light-emitting device（OLED） has been commercialized since 1997,blue light-emitting material is still a challenge for full color display.It is crucial to develop blue emitting material with high efficiency and color purity.The thermal stability and its color purity of blue electrophosphorescent materials are still far from commercialization,but a lot of achievements on excellent blue electrofluorescent materials have been made.Anthracene derivatives and spirobifluroene compounds show high performance in thermal stability and color purity,while nitrogen-containing compounds are competitive in efficiency because of their special electronic structure.Based on its structure,the blue electrofluorescent materials can be classified into aromatic hydrocarbons,nitrogen-containing compounds,and other organic compounds containing other hetero-atoms.The developments of blue electrofluorescent materials are reviewed at present,and the prospect on blue electrofluorescent materials is also discussed.