可溶液加工的蒽醌/芴类双极性荧光材料的合成及其光电性质

Synthesis and Optoelectronic Properties of a Solution-Processable Anthraquinone/Fluorene Hybrid Bipolar Fluorescent Material

通过Suzuki反应合成得到了一种可溶液加工的蒽醌/芴类双极性荧光材料2-蒽醌基-9,9′-二异辛基芴(FAA),利用紫外吸收光谱和荧光发射光谱对其光物理性质进行了初步研究,并采用密度泛函理论计算方法分析了分子光物理性质的本质。通过单载流子器件的性能测试,证实了FAA具有较好的双极性传输特性。进而研究了该材料的电致发光性能,将其掺杂于主体材料1,3-双(9-咔唑基)苯(mCP)中,利用旋涂法制备了结构为ITO(氧化铟锡)/PEDOT:PSS(聚3,4-乙撑二氧噻吩:聚苯乙烯磺酸盐)/mCP:FAA/TmPyPb(1,3,5-三[(3-吡啶基)-3-苯基]苯)/LiF/Al的有机发光二极管。器件的启亮电压约为7.4 V,最大亮度为1719 cd?m^(-2),最大电流效率和最大功率效率分别为1.66 cd?A^(-1)和0.56 lm?W^(-1);同时,结合器件各功能层的能级结构图,探讨了其电致发光机制。

The solution-processable, anthraquinone-based, fluorene bipolar fluorescent material 2-（9,9＇-bis （2-ethylhexyl）-9H-fluoren-2-yl）anthracene-9,10-dione （FAA） was synthesized via a Suzuki reaction. The photophysical properties of FAA were subsequently investigated by acquiring absorption and photoluminescence spectra, and its optical properties were studied using computational density functional theory methods. Data obtained from single-carrier devices incorporating FAA demonstrated its well-matched bipolar charge-transport characteristics. The electroluminescence performance of this material was also examined by doping FAA into a 1,3-di（9H-carbazol-9-yl）benzene （mCP） matrix as the light-emitting layer via spin coating to produce an organic light-emitting diode （OLED） with an indium tin oxide （ITO）/poly（3,4-ethylenedioxythiophene：poly（styrenesulfonate） （PEDOT：PSS）/mCP： FAA/3,3＇-（5＇-（3-（pyridin-3-yl）phenyl）-[1,1 ＇：3＇,1 ＂-terphen-yl]-3,3＂-diyl）dipyridine （Tm PyPb）/ LiF/AI structure. This device exhibited a maximum luminance of 1719 cd. m 2 with a turn-on voltage of 7.4 V, along with maximum current and power efficiencies of 1.66 cd·A^-1 and 0.56 Im· W ^-1, respectively. The electroluminescence mechanism of the OLED is discussed based on the energy level diagrams of the functional layers.