A record-high EQE of 7.65%@3300 cd m−2 achieved in non-doped near-ultraviolet OLEDs based on novel D′–D–A type bipolar fluorophores upon molecular configuration engineering

A non-doped mPPICNC3-based device, exhibiting CIE coordinates of (0.160, 0.032), achieves a record-breaking EQE of 7.67% and negligible efficiency roll-off up to 3300 cd m −2 .