Bipolar hosts derived from dibenzothiophene and indolocarbazole were developed for usage in blue phosphorescent organic light-emitting diodes (PhOLEDs). The 4 position of dibenzothiophene and the 2 position of indolocarbazole were used to couple the dibenzothiophene and indolocarbazole. Two hosts, with and without a π linker, were synthesized, characterized, and explored as hosts for a blue phosphorescent emitter. The blue PhOLEDs fabricated using the new hosts demonstrate high external quantum efficiency over 18%.

中文翻译：

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用于蓝色磷光有机发光二极管的二苯并噻吩和吲哚并咔唑成芯的双极性主体

衍生自二苯并噻吩和吲哚并咔唑的双极性主体已开发用于蓝色磷光有机发光二极管（PhOLED）。二苯并噻吩的4位和吲哚并咔唑的2位用于偶联二苯并噻吩和吲哚并咔唑。合成，表征和探索了具有和不具有π接头的两个主体，作为蓝色磷光发射体的主体。使用新的主体制造的蓝色PhOLED具有超过18％的高外部量子效率。