| abstract |
PROBLEM TO BE SOLVED: To provide an organic electroluminescence device exhibiting high light emission luminance and light emission efficiency and excellent in durability. An organic electroluminescence device having an organic layer between a pair of electrodes, the organic layer comprising at least one region doped with another material in a single host material, and the host material An organic electroluminescent device comprising at least one light emitting region. In particular, the organic layer includes three regions of a hole transport region, a light emitting region, and an electron transport region, and the three regions are doped with a hole transport material, a light emitting material, and an electron transport material in a single host material, respectively. Good results can be obtained by setting the area. [Selection figure] None |