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相对于传统的无机半导体器件,以有机半导体(特别是聚合物半导体)材料为基础的有机光电器件,可采用与传统印刷技术(例如喷墨打印、卷对卷印刷等)相结合的溶液加工方式制备低成本、大面积、柔性光电器件,因而成为广泛关注的焦点,并得到了快速发展.实现溶液加工的高效有机光电器件的一个关键问题是界面问题——如何避免溶液加工时有机层间的互溶以及如何实现可印刷稳定金属电极的高效电子注入等.水/醇溶性共轭聚合物的迅速发展为解决溶液加工多层有机光电器件所面临的界面问题提供了有效手段.研究发现,水/醇溶共轭聚合物不但可以有效避免溶液加工多层器件中的界面互溶,而且还可与高功函数的稳定金属发生界面偶极相互作用而增强其电子注入,从而解决了高功函数稳定金属电子注入的难题,为实现全溶液加工的高效印刷有机光电器件提供了可行的方案.本文介绍了近年来本课题组在水/醇溶共轭聚合物阴极界面材料及器件应用方面的研究进展,并对水/醇溶共轭聚合物阴极界面材料在聚合物发光二极管和聚合物太阳电池中的工作机理进行了探讨.
Organic optoelectronic devices based on organic semiconductors, in particular polymer semiconductors, can be produced by solution processing in combination with conventional printing techniques such as ink jet printing, roll-to-roll printing, etc., as compared to conventional inorganic semiconductor devices The preparation of low cost, large area, flexible optoelectronic devices has become the focus of attention and has been rapidly developed.One of the key issues in the field of efficient organic optoelectronic devices for solution processing is the interfacial problem - how to avoid the inter-layer Mutual solubility and efficient electron injection of printable stable metal electrodes, etc. The rapid development of water / alcohol-soluble conjugated polymers provides an effective solution to the interface problems faced by solution-processing multilayer organic optoelectronic devices.It is found that water / Alcohol-conjugated polymers not only can effectively avoid interfacial interfacial solubilization in solution-processing multilayer devices, but also can interfacial dipole interaction with high work function stable metal to enhance their electron injection, thus solving the problem of high work function stable metal The challenge of electron injection is provided for the efficient printing of organic optoelectronic devices for full solution processing Feasible scheme.This paper introduces the recent research progress of our group in the application of water / alcohol conjugated polymer cathode interface materials and devices, and the water / alcohol conjugated polymer cathode interface material in the polymer light emitting diode And polymer solar cell in the working mechanism were discussed.