中文摘要：

采用修饰多层LB膜的方法制备了导电聚合物聚-3，4-乙烯二氧噻吩／二十烷酸（PEDOT：AA）复合层状有序膜，构筑了一种导电聚合物镶嵌的多层有序膜结构．将这种导电聚合物有序薄膜沉积于ITO电极表面，将其作为有机电致发光二极管（OLED）的空穴注入层，并研究了ITO／（PEDOT：AA）／MEH—PPV／A1器件的性能．研究结果表明，与采用聚3,4-乙烯二氧噻吩／聚苯乙烯磺酸（PEDOT：PSS）自组装膜和旋涂膜作为空穴注入层的ITO／（PEDOT：PSS）／MEH—PPV／A1器件相比，器件的发光效率增加，起亮电压降低．我们认为这是由于PEDOT：AA薄膜提供了一种有序层状结构后，减小了ITO与MEH—PPV间的接触势垒，改善了空穴载流子注入效率．进一步的研究表明，由于PEDOT：AA多层膜间靠较弱的亲水、疏水作用结合，这种导电多层有序膜的热稳定性与普通LB膜相似，在较高温度下发生从层状有序态到无序态的变化，这是导致OLED器件性能发生劣化的主要原因．

英文摘要：

A novel layer-ordered ultrathin film of poly（3,4-ethylene dioxythiophene）/arachidic acid （PEDOT：AA） was prepared by a modified Langmuir-Blodgett （LB） technique and an ordered conducting polymer embedded multilayer structure was constructed. The layer-ordered structure was deposited on an indium-tin oxide （ITO） surface as a hole injection layer for use as an organic light-emitting diode （OLED） and the luminance performance of the ITO/（PEDOT： PSS）/MEH-PPV（poly（2-methoxy-5-（2＇-ethyl-hexyloxy）-l,4-phenylene-vinylene））/A1 device was investigated. Compared with electrostatic self-assembly （ESA） and spin-coating the poly（3,4-ethylene dioxythiophene）/polystyrenesulfonate （PEDOT：PSS） film showed enhanced luminance efficiency. The higher luminance at an equivalent voltage and lower turn-on voltage was observed after the PEDOT：AA film was utilized as hole injection layer in OLED. The enhanced carrie injection efficiency was attributed to the good layer-ordered structure of PEDOT：AA film, which decreased the contact resistance between ITO and the emitting layer. Further investigation revealed that this layer-ordered conducting polymer film exhibited poor temperature stability because of weak hydrophilic and hydrophobic interactions between adjacent LB layers. These weak interactions result in the film structure changing from a layer-ordered structure into an unordered structure at higher temperatures.