| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic light emitting diode having high intensity, high external quantum efficiency, high current efficiency and excellent CIE coordinates. SOLUTION: This organic light emitting diode comprises an anode + on a base material 100, an electroluminescent medium 400 on the anode(+), and a cathode(-) on the electroluminescent medium 400. The electroluminescent medium 400 comprises a luminous layer 30 containing a phosphorescent Ir complex. The luminous layer 30 contains a host compound and the Ir complex is doped in the host compound. A positive-hole transport layer 20 is between the anode(+) and the luminous layer 30. A hole injection modification layer 10 is between the anode(+) and the positive-hole transport layer 20. A hole-inhibiting layer 40 is between a cathode(-) and the luminous layer 30, and the hole-inhibiting layer 40 contacts with the luminous layer 30. An electron transport layer 50 is between the hole-inhibiting layer 40 and the cathode(-). COPYRIGHT: (C)2005,JPO&NCIPI
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