Molecular engineering of phosphacycle-based thermally activated delayed fluorescence materials for deep-blue OLEDs†
Naoya
Aizawa 
a
and
Takuma
Yasuda
*ab
a
and
Takuma
Yasuda
*ab
Abstract
To produce efficient deep-blue emitters, a new family of thermally activated delayed fluorescence (TADF) molecules based on dibenzo-fused phosphacycles was designed. OLEDs employing a phenothiaphosphine sulfide derivative as a TADF emitter displayed blue electroluminescence with a maximum external quantum efficiency of 13% and CIE color coordinates of (0.15, 0.23).
- This article is part of the themed collection: Celebrating 50 years of Professor Fred Wudl’s contributions to the field of organic semiconductors
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