聚芴类有机电致发光的材料和器件

Materials and Devices in the Field of Polyfluorene Derivatives Organic Electroluminescence

综述了聚芴类有机电致发光领域中材料和器件的研究现况和展望。主要围绕有机电致发光的基本原理、近年来聚芴类有机电致发光的材料制备、器件改进情况和有机电致发光的应用前景三方面内容进行了评述。

The development of organic electroluminescence （EL） materials has attracted much attention from academic and industrial groups due to their potential for application in full-colour fiat panel displays. The displays have many merits, such as low operating voltage, wide viewing angle, fast video response, and so on. The three primary colors, red, green, and blue, are essential to achieve full color displays. Although the red and green EL materials seem to have attained sufficiently high efficiencies and lifetimes for commercial applications, many challenges remain for improvement in the blue spectral region in terms of efficiency, durability in air, and spectral stability （color purity）. In recent years, polyfluorene and its derivatives have been extensively studied for blue LEDs due to their wonderful performance in organic electroluminescence, exceptionally high solubility, high photoluminescence quantum yields in the solid state, good charge transport properties and easy designing synthetic route. So they are very promising candidates for blue Organic Light-Emitting Diodes （OLEDs）, and can be used as light-emitting layers, hole-transporting layers, hole buffer layers, etc. This paper reviews the development of polyfluorene and its derivatives used in OLEDs, it is divided in four parts. The first paa is the background and the basic principle of organic electroluminescence. The second part introduces the blue, red, green, and white light-emitting polyfluorene and its derivatives, and the common synthe- sis methods including palladium （0）-mediated Suzuki polycondensation, Ni （0）-mediated polymerization, Gilch polymerization method, Ullmann condensation, and Yamamoto polycondensation, etc. The third part reviews the development of devices based on polyfluorene and its derivatives, including doping EL devices, exciplex emitting OLEDs, and the influence of structure of EL devices on the EL performance. The last one gives a prospect of the development and application of the organic electroluminescence devices.