Water/alcohol soluble electron injection material containing azacrown ether groups: synthesis, characterization and application to enhancement of electroluminescence
作者:Chia-Shing Wu、Huai-An Lu、Chiao-Pei Chen、Tzung-Fang Guo、Yun Chen
DOI:10.1039/c3ob42070a
日期:——
environmentally stable metal as the cathode in a polymer light-emitting diode (PLED) is an essential requirement for its practical application. We present the preparation of a water/alcohol soluble copoly(p-phenylene) (P1) containing pendant azacrown ether and ethylene glycol ether groups as a highly efficient electron injection layer (EIL) for PLEDs, allowing the use of environmentally stable aluminum as
在聚合物发光二极管(PLED)中使用环境稳定的金属作为阴极是对其实际应用的基本要求。我们提出了一种水/醇溶性共聚(对苯撑)(P1)的制备方法,该方法包含侧链氮杂冠醚和乙二醇醚基团作为PLED的高效电子注入层(EIL),从而允许使用环境稳定的铝作为PLED。阴极。使用P1作为EIL的多层PLED [ITO / PEDOT:PSS / PF-Green-B / EIL / Al]显示出显着增强的器件性能,尤其是在存在K 2 CO 3或Cs 2 CO 3的情况下。与没有EIL(0.16 lm W -1的设备)相比,以Cs 2 CO 3掺杂的P1作为EIL的设备的最大发光效率和最大亮度分别提高到9.16 lm W -1和17 050 cd m -2。,890 cd m -2)。同时,导通电压也从5.7 V显着降低到3.7V。性能的提高归因于改善的电子注入,这已通过开路电压(V oc)的升高得到证实