研究目的
Investigating the development of a novel highly efficient violet/deep-blue fluorescent emitter by linking carbazole and naphthalene with large torsion angles for organic light-emitting diodes (OLEDs).
研究成果
A novel highly efficient violet/deep-blue fluorescent emitter was developed by linking carbazole and naphthalene with large torsion angles. The designed emitter shows bright violet/deep-blue emission at wavelength of 400 nm with high ΦPL up to 0.65 in neat film, and the FWHM of emitter is narrow (39 nm). The maximum emission peak, luminance and EQE for violet/deep-blue electroluminescence with 1931 CIE coordinates of (0.16, 0.04) are 410 nm, 1326 cd/m2 and ～2%, respectively.
研究不足
The preliminary device performance is not high, which could be attributed to the less efficient device structure which do not well limit electron and hole carrier in emitting layer, inducing a low exciton utilization rate.
