影像科学与光化学2017，Vol.35Issue(5)：720-728,9.DOI:10.7517/j.issn.1674-0475.2017.04.032
不对称刚性扭曲菲并咪唑分子的设计合成及其深蓝电致发光性能研究
Deep Blue Electroluminescence from an Asymmetrically Twisted and Rigid Phenanthroimidazole Molecule
摘要
Abstract
Efficient deep-blue organic emitters are of particular significance in organic electroluminescence.In this work,by using an asymmetrically twisted and rigid molecular design strategy,a high-efficiency deep-blue bisphenanthroimidazole emitter,MBTPI,was successfully synthesized,characterized and applied in a high-performance deep-blue organic light-emitting device (OLED).It shows high decomposition temperature (496 ℃) and high glass transition temperature (190 ℃),which are favorable for device stability.Its molecular conjugation was efficiently controlled by an asymmetrically twisted and rigid molecular structure,which makes its emission band locates at deep blue region,and solid film emission quantum yield is as high as 74％.Theoretical calculation also proves the presence of asymmetrically twisted rigid molecular structure,and the methyl dose change the molecular geometry,but has little influence on frontier orbital distribution,which is beneficial for maintaining good bipolar transporting property.MBTPI-based non-doped OLED displays a stable and highly efficient deep-blue electroluminescence with CIE coordinates (0.15,0.07),which is very close to the NTSC deep-blue standard (0.14,0.08).External quantum efficiency is high up to 4.91％,which is comparable to the state-of-the-art deep-blue non-doped OLEDs with CIEy lower than 0.08.关键词
菲并咪唑/深蓝光/有机电致发光材料/非掺杂器件Key words
phenanthroimidazole/deep-blue emission/organic light-emitting material/non-doped device引用本文复制引用
陈文铖,李振声,佟庆笑..不对称刚性扭曲菲并咪唑分子的设计合成及其深蓝电致发光性能研究[J].影像科学与光化学,2017,35(5):720-728,9.基金项目
国家自然科学基金(51673113)、国家973计划(2013CB834803)和国家重点研发计划(2016YFB0401002)资助 （51673113）
