| 摘要 |
Disclosed is a white light emitting organic electroluminescent element having high efficiency and a long life. The organic electroluminescent element is provided with a red phosphorescent light emitting layer (12), a green phosphorescent light emitting layer (11), a blue fluorescent light emitting layer (22) and a green fluorescent light emitting layer (21). A phosphorescent light unit (1) is composed of the red phosphorescent light emitting layer (12) and the green phosphorescent light emitting layer (11). A fluorescent light unit (2) is composed of the blue fluorescent light emitting layer (22) and the green fluorescent light emitting layer (21). The phosphorescent light unit (1) and the fluorescent light unit (2) are connected through an intermediate layer (3). Preferably, the phosphorescent light unit (1) is disposed closer to the cathode side than the fluorescent light unit (2). Preferably, the emission colour is one selected from the ranges 3900-4500K, 3200-3700K, and 2600-3150K. |
