Abstract Three new organic bipolar molecules containing phenothiazine and phenanthoimidazole moieties, 10-butyl-3-(phenanthroimidazol-2-yl)phenothiazine (PI-PTZ), 10-butyl-3-((4-(tert-butyl)phenyl)phenanthroimidazol-2-yl)phenothiazine (PPI-PTZ) and 10-butyl-3,7-bis((4-(tert-butyl)phenyl)phenanthroimidazol-2-yl)phenothiazine (PPI-PTZ-PPI), were successfully synthesized for organic light-emitting devices. Their thermal stabilities, photophysical and electrochemical properties were investigated systematically. These compounds exhibited strong blue or blue-green emissions with photoluminescence quantum efficiency (Φf) of 41.48 %, 40.51 % and 61.52 % in chloroform solutions, while their Φf in the solid thin films decreased to 37.53 %, 34.05 % and 47.77 %, respectively. Furthermore, the vacuum-processed doped devices based on these compounds were fabricated, in which the devices based on the compound PPI-PTZ-PPI exhibited the best electroluminescence performance with a maximum brightness of 30,180 cd/m2, a maximum current efficiency of 10.65 cd/A and a maximum external quantum efficiency (EQE) of 4.0 %.

中文翻译：

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含有吩噻嗪和吩并咪唑部分的有机双极分子的光和电致发光特性

摘要 三种含有吩噻嗪和菲咪唑部分的新型有机双极性分子，10-丁基-3-(phenanthroimidazol-2-yl)吩噻嗪 (PI-PTZ)，10-丁基-3-((4-(叔丁基)苯基)phenanthroimidazol -2-基）吩噻嗪（PPI-PTZ）和10-丁基-3,7-双（（4-（叔丁基）苯基）菲咪唑-2-基）吩噻嗪（PPI-PTZ-PPI）成功合成用于有机发光器件。系统地研究了它们的热稳定性、光物理和电化学性质。这些化合物在氯仿溶液中表现出强烈的蓝色或蓝绿色发射，光致发光量子效率（Φf）分别为41.48%、40.51%和61.52%，而它们在固体薄膜中的Φf分别降至37.53%、34.05%和47.77% . 此外，