Application of fluorene-based blue light-emitting chromophores in synthesis of organic electroluminescent materials

The organic electroluminescence (EL) technology, which has been the research focus in the field of electro-optical information, holds a wide range of potential application in domains of communication, information display and illumination and so on. Organic EL materials have many advantages when compared to their inorganic counterparts. Fluorene, as a kind of rigid plane biphenyl compound with wide band gap, high luminescent efficiency and high flexibility to modify the molecule skeleton, has been a key blue-emitting chromophore in organic EL. In this regard, fluorene-based blue-emitting materials are widely used in synthesis of highly efficient blue light-emitting materials, host materials, white light-emitting materials, organic lasers and organic nanomaterials, among which adjustment of the (3 phase structure and multiple functionalization are also main research directions. In this review paper, the applications of fluorene-based bule-emitting chromophores in organic EL are discussed in detail, and the progress of polyfluorene and its derivatives in the aspect of host materials and white materials is reviewed. Fluorene-based organic nanomaterials are concisely introduced. The synthesis methods of the polymers are concisely introduced. Finally, some issues to be addressed and hotspots to be further investigated are discussed.