| abstract |
Compounds having Formula I or Formula II are provided. [Chemical 1] In formula I, R 1 to R 4 are the same or different and are H, D, alkyl, silyl, alkoxy, cyano or aryl. At least two of R 1 to R 4 are aryl groups, and at least one of the aryl groups includes an N, O, S-heterocycle. When two of R 1 to R 4 contain an N-carbazolyl group, two of R 1 to R 4 are not aryl. [Chemical 2] In Formula II, Q is a single bond or hydrocarbon aryl, and R 5 and R 6 are the same or different and are each H, D, alkyl, silyl, alkoxy, cyano or aryl. . At least one of R 5 and at least one of R 6 is an aryl group. At least one of the aryl groups includes an N, O, S-heterocycle. |