An axially chiral thermally activated delayed fluorescent emitter with a dual emitting core for a highly efficient organic light-emitting diode?

Chemical Communications Pub Date: 2020-07-09 DOI: 10.1039/D0CC03822A

Abstract

An axially chiral TADF emitter, 4tBuCzPN, with a dual emitting core was easily synthesized. Compared with the TADF emitter 2tBuCzPN with the PLQY of 29% and EQE of 5.3%, 4tBuCzPN showed a significantly increased PLQY (74%) and EQE (20.8%) for its OLED. Moreover, the enantiomers of 4tBuCzPN also exhibited mirror-image CD and CPL properties, and the glum values of (+)-4tBuCzPN and (?)-4tBuCzPN were +5.4 × 10?3 and ?5.0 × 10?3 in toluene, respectively.

Graphical abstract: An axially chiral thermally activated delayed fluorescent emitter with a dual emitting core for a highly efficient organic light-emitting diode
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