Progress in fluorene-based electroluminescent materials

The development of organic electroluminescent materials is one of the forefronts and hot areas of the optoelectronic information materials, on account of the advantages of organic electroluminescent materials compared to inorganic counterpart. Fluorene and its derivatives which have an aromatic biphenyl structure with wide energy gap in the backbones and high luminescent efficiency have drawn much attention of materials chemists and device physicists. The progress about fluorene-based electroluminescent materials domestic and abroad as well as our own work in the past few years is reviewed. Some issues to be addressed and hotspots to be further investigated are also discussed.