| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly stable and efficient organic light emitting device. SOLUTION: The highly stable and efficient organic light emitting device having a phosphorescent-doped mixed-layer structure includes: an anode layer; a hole injection layer that is formed on the anode layer; a mixed layer that is formed on the hole injection layer and includes an organic low-molecular hole transport material, an organic low-molecular electron transport material, and a phosphorescent dopant; and a cathode layer that is formed on the mixed layer. An electron transport layer may be present between the mixed layer and the cathode layer, and a hole transport layer may be present between the hole injection layer and the mixed layer. COPYRIGHT: (C)2009,JPO&INPIT
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