A compound having a structure of Formula I, provided. In Formula I, each of R1 to R7 is hydrogen or phenyl or a system consisting of two to ten phenyl groups connected to each other; at least two of R1 to R7 are not hydrogen; each of R8 and R9 are phenyl or a system consisting of two to ten phenyl groups connected to each other; X is O, S, or Se; and L is a direct bond or In the structure of L, m is an integer from 1 to 5, and RA is hydrogen, an aromatic or a heteroaromatic ring. Formulations, OLEDs, and consumer products containing the same are also provided.