| 摘要 |
<p>PURPOSE: An organic light emitting device is provided to have an HOMO level which has a small difference from the HOMO level of a neighboring hole transfer layer, thereby improving driving voltage and efficiency. CONSTITUTION: An organic light emitting device comprises a first electrode(2) and a second electrode(8) facing each other; a hole transfer layer(4) between the first electrode and second electrode; a light-emitting layer(5); and an electron transfer layer(6). The light-emitting layer includes a compound represented by chemical formula 1. In chemical formula 1, each of R1, R2, R3, R4, R5, and R6 is selected from hydrogen or C^-30 aromatic rings, or selected from C4-28 heterocyclic compounds which has one element of N, O, S, and P; X is substituted by one element of N, O, and S; and each of R7 and R8 is selected from fused aromatic rings.</p> |
