Sulfone-Participated Organic Narrowband Emitters: Design Strategy and Recent Progress

摘要

Purely organic sulfone-embedded materials play a significant role in thermally activated delayed fluorescence (TADF) emitters with theoretical 100 % exciton utilization for highly efficient organic light-emitting diodes. However, intrinsic emission mechanism featuring twisted intramolecular charge transfer design strategy leads to severe structural distortion between ground state and excited state, disabling traditional sulfone-based TADF emitters to achieve narrowband emission and high colour purity for wide colour gamut display. Recently, sulfone-embedded narrowband TADF emitters have gradually emerged. Herein, we summarize the currently reported sulfone-based narrowband emitters, with emphasis on the perspectives of molecular design, role of sulfone group in fused skeleton, photophysical property as well as future application prospect of this sort of materials. @@@ Sulfone-participated narrowband emitters have recently emerged as an attractive sort of narrowband materials. Precious regulation of molecular vibrations and maximizing the function of sulfone group with bending vibration are beneficial for this sort of materials to realize narrowband emission and high colour purity.image

关键词