Extending the π‐Skeleton of Multi‐Resonance TADF Materials towards High‐Efficiency Narrowband Deep‐Blue Emission
Shenzhen University · University of Chinese Academy of Sciences · +1 more institution
Abstract
Abstract Multi‐resonance TADF (MR‐TADF) emitters are promising for high‐resolution OLEDs, but the concurrent optimization of excited‐state dynamics and color purity remains a tough challenge. Herein, three deep‐blue MR‐TADF compounds ( BN1 – BN3 ) featuring gradually enlarged ring‐fused structures and increased rigidity are accessed by lithium‐free borylation in high yields from the same precursor, with all the emitters possessing CIE y coordinates below 0.08. Structure–property investigations demonstrate a strategic improvement of the oscillator strength ( f osc ) and acceleration of the reverse intersystem crossing (RISC) process by extending the π‐skeleton, where BN3 realizes a maximum external quantum…
Citation impact
- FWCI
- 20.96
- Percentile
- 100%
- References
- 58
Authors
13Topics & keywords
- Quantum efficiency
- Intersystem crossing
- OLED
- Materials science
- Quantum yield
- Optoelectronics
- Fluorescence
- Narrowband