High-performance blue phosphorescent OLEDs using energy transfer from exciplex.

Seino, Yuki; Sasabe, Hisahiro; Pu, Yong-Jin; Kido, Junji · Adv Mater · 2014

basic_science · Level V

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Abstract

An efficient energy transfer from an exciplex between a sulfone and an arylamine derivatives to a blue phosphorescent emitter enables OLED performances among the best, of over 50 lm W(-1) at 100 cd m(-2) . The formation of the exciplex realizes a barrier-free hole-electron recombination pathway, thereby leading to high OLED performances with an extremely low driving voltage of 2.9 V at 100 cd m(-2) .