【作者】 张志鹏；

【导师】 曹镛； 黄飞；

【作者基本信息】 华南理工大学 ， 高分子化学与物理， 2012， 硕士

【摘要】 有机发光二极管（OLEDs）由于其在平板显示和高效节能照明光源等领域表现出极大的前景，吸引了科学界和产业界的广泛关注。目前，水/醇溶共轭聚合物被广泛用作有机发光二极管（OLEDs）器件的电子注入/传输层材料。因水/醇溶共轭聚合物能够在甲醇或水等其他共轭聚合物不溶的溶剂中加工，从而解决了通过溶液加工方法制备多层OLED器件过程中的发光层与电子注入层之间共混的问题，因此提高和增加水/醇溶共轭聚合物的性能和用途具有重要的现实意义。本文介绍了近年来水/醇溶共轭聚合物（WSCP）在有机发光二极管（OLED）领域的研究进展；设计合成了侧链带胺基的二溴咔唑单体（M1），并以此单体为核心，通过与三种不同的硼酸酯单体发生Suzuki偶联反应而得到三种WSCPs：PCCN、PCFN和PCTN，进一步将WSCPs进行离子化反应而得到了两种WSCPs的季铵盐：PCFN-Br和PCTN-Br。我们研究了聚合物PCFN、PCCN、PCTN、PCFN-Br和PCTN-Br的电子注入/传输性能，在器件结构ITO/PEDOT：PSS/P-PPV/EIL/Al中，相比单独以Al作阴极器件的发光效率，PCCN器件和PCFN器件的发光效率提高了近40倍，PCTN器件的发光效率提高了约10倍，它们的最大发光效率分别达到了11.1cdA^-1、12.1cdA^-1、3.02cdA^-1。这表明在以功函金属Al作阴极的OLED器件中，聚合物PCCN和PCFN具有很好的电子注入性能，聚合物PCTN具有比较好的电子注入性能。同时还研究了PCTN-Br的空穴注入/传输性能，在器件结构ITO/HTL/P-PPV/CsF/Al中，相比单独以ITO作阳极器件的发光效率，PCTN-Br器件发光效率提高了50多倍，最大发光效率达到了8.28cdA^-1，这表明聚合物PCTN-Br具有很好的空穴注入性能。更多还原

【Abstract】 Organic light-emitting diodes (OLEDs) have drawn considerable interest among researchers and industries because of their great prospective in the field of flat panel display and efficient solid-state lighting. At present, water-/alcohol-soluble conjugated polymers (WSCP) by extensively as electron injection/transport layer material of organic light-emitting diodes(OLEDs) device。Because WSCPs can be processed from solvents, such as methanol and water, in which most conjugated polymers are insoluble. The feature culd solve the problem of mixing between the electroluminescent layer and the adjacent electron-injection layer for the fabrication of multilayer OLED devices by solution processing. It is essential to improve the performance of WSCPs and increase the applications of WSCPs in OLED devices.In this paper, we described the recent research progress of WSCP materials in OLED field. And the new aminoalkyl-substituted cabazole compound(M1) were synthesized. Three WSCPs, including PCCN、PCFN and PCTN, based on the aminoalkyl-substituted cabazole core compound were synthesized by Suzuki coupling reaction. And their quaternized ammonium poly electrolyte derivatives(PCFN-Br and PCTN-Br) were obtained through a postpolymerization treatment on the terminal amino groups.We researched the electron injection properties of polymer PCFN、PCCN、PCTN、PCFN-Br and PCTN-Br, by using PCFN、PCCN or PCTN as electron-injection layer(EIL) in device configuration of ITO/PEDOT:PSS/P-PPV/EIL/A1, the PCCN、PCFN cathode devices’s luminous efficiencies(LE) respectively reached11.1cdA-1and12.1cd A-1, which is more than forty times higher than that of bare Al cathode device. And the PCTN cathode devices’s luminous efficiencies(LE) reached3.02cd A-1, which is more than ten times higher than that of bare Al cathode device. We have showed that such neutral polymers can be used as an electron-injection layer,which can significantly enchance device performance of lighe-emitting plymers with high work-function metals such as Al.The hole injection properties of polymer PCTN-Br were also researched, by using PCTN-Br as hole-injection layer(HIL) in device configuration of ITO/HIL/P-PPV/CsF/Al, the PCTN-Br devices’s LE reached8.28cdA-1, which is more than fifty times higher than that of bare ITO anode device. We have showed that these quaternized ammonium polyelectrolyte derivatives can be used as an hole-injection layer,which can significantly enchance device performance of lighe-emitting plymers.更多还原