Color tuning of Novel 2,1,3-Naphthothiadiazole and 2,1,3-Benzoselenadiazole based D-A-D′ Type dopants to realize highly efficient saturated red emission in non-polar solvents

By introduction of 2,1,3-naphthothiadiazole (NT) and 2,1,3-benzoselenadiazole (BS) electron withdrawing units, a series of D-A-D′ type red dopants were synthesized. All of them realized saturated red emission with high fluorescent quantum yields (Φf) in non-polar toluene solutions, especially for MC6, which shows a deep red emission at 643 nm with a Φf of 0.51.