Abstract

Abstract 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%.

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