| 摘要 |
An organic electro luminescent 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.
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