High-Performance Blue Phosphorescent OLEDs Using Energy Transfer from Exciplex

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Abstract

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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.

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