Asymmetric multiple resonance thermally activated delayed fluorescence emitters for sky-blue and pure blue electroluminescence

Abstract

Since the first report of the multiple resonance thermally activated delayed fluorescence (MR-TADF) emitters employing boron/nitrogen framework, a large number of MR-TADF materials have been developed due to the advantages...

Unveiling the photophysical and excited state properties of multi-resonant OLED emitters using combined DFT and CCSD method

“…9,34–37 A narrow full-width at half-maximum (FWHM) of less than 35 nm is beneficial for enhancing the spectral purity. 38–40 Extending the molecule (donor–acceptor) or introducing substitution (heavy atoms) gradually increases the performance and reduces the FWHM value. 38–40 Recent studies by Park et al explored organoboron emitters doped with chalcogens to enhance the MR-TADF property for achieving excellent color purity and high luminescence efficiency.…”

“…38–40 Extending the molecule (donor–acceptor) or introducing substitution (heavy atoms) gradually increases the performance and reduces the FWHM value. 38–40 Recent studies by Park et al explored organoboron emitters doped with chalcogens to enhance the MR-TADF property for achieving excellent color purity and high luminescence efficiency. 41 Using the design concept by Hatakeyama et al , featuring the MR effects as a new approach to the development of narrowband TADF emitters, MR-TADF molecules used polyaromatic compounds based on organoboron.…”