4,5-Diazafluorene-Incorporated Ter(9,9-diarylfluorene): A Novel Molecular Doping Strategy for Improving the Electron Injection Property of a Highly Efficient OLED Blue Emitter

A more efficient OLED device with blue emission characteristic of terfluorene has been achieved by using a novel molecular doping strategy, in which 4,5-diazafluorene was incorporated as the substitution group of terfluorene to facilitate electron injection from the metal cathode yet without altering emission characteristics.