We developed two symmetrical green MR‐TADF emitters, BpIC‐DPA and BpIC‐Cz, based on the rigidification and regulation of molecular orbitals (MO) engineering strategies. Both emitters exhibited pure green emission with narrow FWHM below 25 nm and high PLQY over 84%. Among the fabricated OLEDs, BpIC‐Cz‐device showed maximum external quantum efficiency (EQE max ) of 25.7% with alleviated efficiency roll‐off characteristics (EQE 1000nits = 24.3%) and longer device‐lifetime (LT90) of 291 h at the initial luminance of 1000 nits.
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Palanisamy et al. (2024) studied this question.
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