| 摘要 |
The present invention relates to an organic electroluminescent device comprising a mixed organic electroluminescent layer Ax' By' Cz inserted between the anode side and the cathode side, wherein A, B, and C are components capable of transporting holes, electrons and hole blocking component respectively, and x' represents the content of A component, y' represents the content of B component, and z represents the content of C component. The sum of x', y', and z is 100%. The component C is a hole blocking component comprising an organic medium with high ionization potential and high electron affinity.
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