New triphenylamine derivatives for organic EL.

在有机电致发光(EL)显示器件中，未来的全彩色显示对热稳定材料提出了更高的要求。本论文设计了一种新型的具有螺环芳香骨架的三苯胺类化合物，作为多层器件中高效的空穴传输材料。成功地合成了具有单螺环或双螺环结构的各种新型三苯胺。它们都表现出很高的热稳定性，实际使用所需的玻璃化转变温度超过100℃。这些胺的电致发光特性依赖于有机结构，其中二苯偶氮菊烯(DBC)类型被偶然发现显示出极高的亮度。事实证明，这是由于自发光的性质，因此是最有希望的实际应用。我们对螺环化合物的合成、结构和性质的研究结果在有机化学以及有机电致发光器件的未来发展中都很有趣-(见几篇论文)。

In the organic electroluminescent (EL) display devices, thermally stable materials are demanded for the coming full-color display. New triphenylamine derivatives having a spirocyclic aromatic skeleton are devised for the efficient hole-transport material in the multi-layered devices.Our research efforts led to the following results.1. Various types of new triphenylamines having a mono- or di- spirocyclic structure were successfully prepared. They showed all high thermal stability as indicated by glass transition temperatures over 100℃ required for practical use.2. EL characteristics of these amines depended on the organic structure, Among them, dibenzochrysene (DBC) type was incidentally found to show exceedingly high luminance. It turned out to be due to self-emissive nature, thus being the most promising for practical application.3. Our findings on the synthesis, structure and properties of spiro compounds are interesting in organic chemistry as well as for future development in organic EL devices-(see several papers).