Abstract
Creating fluorophores that meet the Broadcast Service Television 2020 (BT.2020) standard is a significant achievement. In this paper, we present an innovative strategy that could revolutionize the development of high‐performance narrowband fluorophores for ultra‐high‐definition displays. Our approach combines classic multi‐resonance BN‐doped fragments with naphthalene, creating two novel narrowband bright green quasi‐fluorescent emitters, NT‐2B and NT‐3B. When tested in dilute toluene, these molecules exhibit emission peaks at 510 and 511 nm with extremely narrow FWHM values of 15 and 14 nm, respectively. Both molecules also demonstrate conventional fluorescence properties with high photoluminescence quantum yields (PLQYs) of up to 85%. Notably, OLEDs containing NT‐2B achieve a peak EQE of approximately 30% and at a doping concentration of 5 wt.%, OLEDs based on NT‐2B achieve a CIEy value of roughly 0.75, closely matching the BT.2020 standard.
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