Design, Synthesis And Properties Of Optoelectronic Materials Based On Perylene Bisimide And Oligocarbazoles

The organic optoelectronic materials are a kind of organic materials that can exhibitelectrooptic activity. The organic optoelectronics as an interdiscipline based on the study ofthe optics, electrics and magnetics of organic compounds has emerged with the developmentof the organic optoelectronic materials. It is the development of organic optoelectronicmaterials and devices that promotes the development of the organic optoelectronics.Following the progress in organic optoelectronics, my works study the synthesis,characterization and devices of the organic optoelectronic materials. This thesis is containingthree sections: In the first section, mainly the synthesis of a novel oligocarbazoles and thestudy of their photoelectronic properties. Secondly, the synthesis of the D-A type organicoptoelectronic materials based on perylene bisimide and oligocarbazoles, then study theirphotoelectronic properties. The last, the synthesis of the graphere nanoribbons (GNRs)based on perylene bisimide, and the study of their photoelectronic properties.We can easily synthesise the oligocarbazoles by the Suzuki reactions. Theoligocarbazoles exhibit good thermostability, the Tdof the compound Cz-4is as high as494℃and the Cz-5has the highest Tg (54℃). The oligocarbazoles emit deep blue light inthe solid state, and the HOMO level of the Cz-5(-5.19eV) is well matched compared to thefunction of ITO (-5.0eV), and their triplet energy level (ET) is about2.7eV. All above makeus study their property of OLEDs, and the Cz-3has the highest External QuantumEfficiency (EQE=10.6%).The synthesis of the fused compounds based on perylene bisimide and oligocarbazolescarried out conveniently through Suzuki reactions. The fused compounds show a large rangeof absorption (250nm-700nm) and good themostability. The intramolecular charge transfereffect intensively affects their fluorescence properties. We calculate the HOMO and LUMOlevel of the fused compounds by their electrochemical properties and Gaussian software,respectively.We polymerize the tetrabromoperylene bisimide to synthesise the grapherenanoribbons. The structures and properties of the synthesized GNRs are characterized by1H and13C NMR spectra, mass spectra, fourier transform infrared spectroscopy, X-raydiffraction, atomic force microscopy and field emission scanning electron microscopy etc.Particularly, their photoelectronic properties are measured by ultraviolet-visible spectra, photoluminescence spectra, thermogravimetic analysis and cyclic voltammetry etc.