Donor-Modified Asymmetric N/B/O Multi-Resonance TADF Emitters for High-Performance Deep-Blue OLEDs with BT.2020 Color Gamut

Spiro-acridine modified N/B/O type MR-TADF emitters realized deep blue fluorescence with an EQE max of 20.5% and CIE (0.147, 0.048), which is state-of-the-art efficiency for N/B/O type deep-blue MR emitters with CIE y approaching the BT.2020 standard.