Synthesis And Properties Of Electron Transport Function Has An Anthracene Derivative Blue Material

In recent years, there have high expectations of the use of organic light-emitting diodes (OLEDs) in flat panel displays and general lighting applications, owing to the characteristic features such as little energy consumption, low voltage driver, fast response speed, wide working temperature range and so on. In order to realize full-color OLEDs, the red, green and blue materials with high purity and efficiency are the prerequisite conditions. The existing blue-emission materials face to common problems in solid color, such as luminescence efficiency, film forming property, service lifetime and so on, which stand in the way of the organic light-emitting diodes to be applied to the RGB panchromatic display.In this article,1-(4-(9,10-di(naphthalen-2-yl)anthracen-2-yl)phenyl)-2-phenyl-1H-benzo[d]imidazole (ADN-DPBI) was designed as a blue light-emitting anthracene-based derivatives in order to improving the low glass of transition temperature and stability which were the weakness of ADN segment. Introducing the segment of diphenyl-1H-benzo[d]imidazole into the structure of aim matrial, ADN-DPBI could be used as an blue-emission material qualifed the ability of electron transport at the same time.ADN-DPBI was synthesized and identified by1H NMR,13C NMR, IR and elemental analysis. This method contained seven steps and got yield of67%. The fluorescence spectra of ADN-DPBI showed a peak at439.1nm with a strong blue emission. It has a higher glass of transition temperature (Tg) which was188.06℃, respectively. The HOMO, LUMO and bandgap of this material were similar to ADN, which were mainly decided by the anthracene core and effected by the substituents rarely. Compared to ADN, ADN-DPBI present good thin film morphology and it can form high quality amorphous film on the substrate.The research indicated that the anthracene-based derivative, which could be a good blue emitter, present high photoluminescent properties, high thermal stabilities and good thin film morphology. The new material has potential use in promoting the efficiency and lifetime of the OLEDs.