Highly twisted bipolar molecules for efficient near-ultraviolet organic light-emitting diodesviaa hybridized local and charge-transfer mechanism

Using a twisting linker strategy, stable NUV luminogens are prepared with nearly quantitative luminescence. Nondoped OLEDs are fabricated using the dyes as emitters and NUV electroluminescence is achieved with a maximum EQE of 6.97% and a small FWHM of 48 nm.