Enhancing the reverse intersystem crossing (RISC) rates and efficiencies of MR-TADF emitters with a U-shaped molecular structure for solution-processed OLEDs.

ABSTRACT: Multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters hold great potential for applications in organic light-emitting diodes (OLEDs). However, owing to their inherently rigid and planar molecular structures and the localized charge transfer (LCT) characteristics, these emitters typically exhibit poor solubility and low reverse intersystem crossing (RISC) rates, which are unfavorable for high-performance solution-processed OLEDs. Herein, we constructed three U-shaped MR-TADF emitters (BN-N-TTz, BN-N-PCz and BN-N-BN) by introducing triazine, phenylcarbazole and MR-TADF units at the 1- and 8-positions of a naphthalene ring. This U-shaped molecular architecture endows the emitters with excellent solubility. Moreover, this structure not only enhances spin-orbit coupling be

SUBMITTER: Xu S 

PROVIDER: S-EPMC12477633 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature