【作者】 朱凌健；

【导师】 郭灿城；

【作者基本信息】 湖南大学 ， 有机化学， 2005， 硕士

【摘要】 有机电致发光器件因其具有发光效率高，色彩丰富，驱动电压低，器件结构简单等优点而被誉为“二十一世纪的平板显示器”，是当今国际平板显示技术研究的热点之一。虽然绿光和蓝光器件均已可达到实用化，但红光显示还存在亮度低、色度欠佳、发光效率低等问题。因此，为了实现有机发光器件的全色显示，对红光器件的研制显得尤为迫切。本文将基于卟啉化合物具有优良光电性能的特点，结合红色发光器件目前存在的问题，以制备卟啉化合物掺杂8-羟基喹啉铝的红色有机电致发光器件并对其性能研究为目的。本文的工作围绕器件的制备及发光性能的比较而展开，主要分为三部分：首先简单的介绍了有机电致发光器件的发展历史、发光机理及其结构和制备，综述了红色发光器件及卟啉化合物在发光领域里的研究进展。接着，通过改进反应条件合成了纯度在98％以上的电子传输材料8-羟基喹啉铝，同时合成了七种带不同取代基的四苯基卟啉化合物，所有化合物的结构都通过了UV-Vis、MS、NMR的表征，然后对卟啉化合物的紫外吸收光谱和荧光光谱进行了分析，对光谱的差异予以了合理解释。第二部分主要根据实验室现有的镀膜机，自行研究设计了制作掺杂型有机电致发光器件的工艺，并对其制作过程进行了详细描述，同时制备了以合成的四苯基卟啉化合物为发光材料，不同摩尔浓度掺杂8-羟基喹啉铝的器件，器件结构为ITO／TPD／Alq3+TPP／Al。最后对器件进行了性能的比较与研究，讨论了卟啉掺杂8-羟基喹啉铝的发光机理，并分析了掺杂浓度及不同卟啉化合物对器件发光性能的影响，对于器件性能的差异给以了合理的解析。通过分析与比较，得出了化合物摩尔掺杂浓度以及化合物结构与其发光性能的影响关系，为设计制备新型高效的红色发光材料提供了研究基础，这有助于加快红色发光材料的开发。更多还原

【Abstract】 Organic electroluminescent devices have attracted particular attention because of their potential applications in efficient, low -voltage, easy-fabrication, and full-color flat panel displays. Although certain blue- and green-emitting materials have efficiencies sufficient for practical use, red-emitting materials with low brightness, impure color (unsaturated emission) and low efficiency is still not satisfactory. One goal in the research on organic electroluminescent devices is to develop full-color display. Therefore, it is vitally necessary to develop red organic electroluminescent devices.According to porphyrins’ characteristics to have excellent optoelectronic properties and existing problem in red organic electroluminescent devices, this thesis is aimed to fabricate and study red organic electroluminescent devices by doping porphyrins into tris(8-hydroxylquinoline)aluminum.This thesis was focus on the fabrication of organic electroluminescent devices and comparison with their luminescent performance. It was divided into three sections.At first, we simply introduced developing history, the luminescent mechanism, the structure and the fabrication of organic electroluminescent devices. And we summarized research advances on red electroluminescent devices and porphyrins in the luminescent field. Then tris(8-hydroxylquinoline)aluminum(Alq3) with the purity of above 98 percent which was always used as electron transport materials is synthesized by modifying reaction condition and seven tetraphenylporphyrin with different substituent were prepared. The structure of all these compounds were testified by UV-Vis,MS and NMR .And then, we analyze the UV-Vis and fluorescence spectra of all the synthesized porphyrins and give a reasonable explain for their spectral difference.In section two, we designed the technology of fabricating doped organic electroluminescent devices according to the existing vacuum film-plating machine and construct electroluminescent devices by doping tetraphenylporphyrine into tris(8-hydroxylquinoline)aluminum(Alq3) with different intensity as the structure of ITO/TPD /Alq3+TPP/Al.At last, the luminescent mechanism of devices by doping porphyrin into Alq3 was discussed. The effect of different dopants and different mol percentage on luminescent performance was analyzed with comparing and studying the performance of thedevices. And a reasonable explaine for their difference of the performance was given.It is concluded that effect of different compound and different mol percentage on luminescent performance by analysis and comparison, which will provide the basis for designing and preparing novel and efficient red-emitting materials and promote the development of red luminescent materials.更多还原