| abstract |
The invention provides an organic electroluminescent compound, characterized in that its structure is the general formula (I) As shown, where X is N, S, O, Si element, R 1 and R 2 are aromatic groups, R 1 and R 2 can be the same or different groups; where, when X is N, its structure is the general formula (Ⅱ) shown. The R 1 and R 2 are aromatic groups containing at least C or at least C and N, preferably, are aromatic groups containing at least 3-20 C or at least 3-20 C and N . The present invention also provides an OLED electron transport layer material, a light-emitting layer material, and a hole transport layer material containing the compound represented by the general formula (I) or (II). The invention provides an OLED device containing a compound represented by general formula (I) or (II) and a preparation method thereof. The application of the OLED material containing the above compounds in the electron transport layer, light-emitting layer and hole transport layer enables the OLED display to achieve the effects of high brightness, high efficiency and low power consumption. |