| 摘要 |
<p>An organic electroluminescent device including at least a first light reflecting layer (2), a first transparent electrode (3), an organic emitting layer (4), a second transparent electrode (5) and a second light reflecting layer (6) stacked on a substrate (1) in this order; wherein at least one of the first light reflecting layer (2) and the second light reflecting layer (6) is light semi-transmissive. Applied light (A) is reflected between the first and second light reflecting layers (2), (6) and undergoes optical interference effect, and reflected light (B) is emitted outside through the second light reflecting layer (6) which is semi-transmissive. At that time, by adjusting an optical path length between the light reflecting layers (2) and (6), the spectrum of reflected light (B) is allowed to have a sharp peak with a specific value. As a result, the color purity is improved.</p> |
