| abstract |
A new substance capable of increasing the lifetime and emission efficiency of a light-emitting element is provided. A carbazole compound having a structure represented by the general formula (G1) is provided. It should be noted that the substituents (specifically R 1 , R 2 , Ar 3 and α 3 ) in the general formula (G1) are respectively used to make the HOMO energy level of the compound deep and the LUMO energy level shallow, so The bonds of the substituents in the above compounds are replaced by hydrogen. In addition, as each substituent (specifically R 1 , R 2 , Ar 3 and α 3 ) in the general formula (G1) is used a substituent capable of making the band gap (Bg) of the compound wide and the T1 energy level high, the The bond of the substituent in the compound is replaced by hydrogen. |