| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic phosphorescent-light emitting device having a surface of an organic layer conditioned with an adjusting material for improving an efficiency in transport or injection of positive holes and electrons into a light emitting layer. SOLUTION: A adjusting layer is added onto one or both sides of the light emitting layer. The adjusting layer has an energy level substantially equal to that of the light emitting material. The light emitting diode has a first electrode, a light emitting layer connected to the first electrode and a second electrode connected to the light emitting layer. The light emitting layer contains a phosphorescent organic material. A first interfacial layer is arranged between the light emitting layer and the first electrode and has the thickness of about 3 nm or less, while containing an organic material that assists injection of a first charge into the light emitting layer. COPYRIGHT: (C)2007,JPO&INPIT
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