| 摘要 |
PURPOSE: An electron transport material is provided to improve luminescence efficiency and to enable low voltage driving. CONSTITUTION: An electron transport material is denoted by the chemical formula. In the chemical formula, R1 is a substituted or non-substituted heterocyclic compound. An organic electroluminescence device comprise a first electrode, a second electrode facing the first electrode, and a light emitting layer which is placed on the first and second electrodes and comprises a hole injection layer, a hole transport layer, a light emitting layer, an electrode transport layer, and electrode injection layer. |
