| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic light-emitting element with high efficiency.SOLUTION: An ultrathin film (monomolecular film or the like) of an organic light-emitting material such as an iridium complex is provided between a layer of an organic material with high electron transport property (N-type organic material) and a layer of an organic material with high hole transport property (P-type organic material). In this structure, in the layer of the organic light-emitting material, electrons are injected from a LUMO of the N-type organic material to the LUMO of the organic light-emitting material, and holes are injected from a HOMO of the P-type organic material to the HOMO of the organic light-emitting material, so that the organic light-emitting material is excited to emit light.SELECTED DRAWING: Figure 1 |
