| abstract |
Provided is an organic EL element that realizes low-voltage characteristics with high efficiency. Comprised is a light-emitting layer including compounds of (1) and (2) and a dopant. X is N or CR 3 with at least one being N. R 1 is (1b), R 2 is (1c), and R 3 is an alkyl group, etc. Y is O, S, NR 4 , CR 5 R 6 , where R 4 to R 6 is an alkyl group, etc., and one of R 7 to R 14 bonds with a ring of (1). * is the bonding position with the ring of (1), and rings C, D are aromatic rings that condense with an adjacent ring. R 15 , R 16 , and R17 are synonymous with R 3 (a, b are substitution numbers). R 19 is synonymous with R 4 , and R 20 to R 27 are CR 3 , CR 28 or N, with at least one being CR 28 , and R 28 is expression (2b). Z is O, S, NR 37 , CR 38 R 39 , where R 37 to R 39 are synonymous with R 4 , and one of R 29 to R 36 bonds with a ring of (2), and the other is CR 3 or N. |