| 摘要 |
<p>Provided in the present invention is an organic light emitting display device which reduces driving voltage and improves efficiency. The organic light emitting display device according to the present invention is characterized by comprising a first and second electrode facing each other on a substrate; at least two light emitting units formed between the first and second electrodes; and a charge generation layer formed between the light emitting units, and composed of N-type charge generation layer and P-type charge generation layer, wherein the N-type charge generation layer is composed of at least two hosts and dopant, and at least two hosts have different lowest unoccupied molecular orbital (LUMO) energy level.</p> |
