| 摘要 |
Provided is an organic EL device including a light-emitting layer between a first electrode and a second electrode, wherein the light-emitting layer includes a matrix polymer, two or more phosphorescent host materials, and at least one phosphorescent dopant. The organic EL device can increase an energy transfer efficiency by use of a mixture of phosphorescent host materials, and thus have better efficiency and lifetime characteristics, and can be produced by a solution process such as spin-coating.
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