| 简介 |
PROBLEM TO BE SOLVED : To provide an electron transport material having a novel 3, 5-dipyridyl phenyl derivative exhibiting electronic transport property, maintaining high triplet energy, excellent in electron injection property, hole block property and heat characteristic, and useful for a high-efficient phosphorescence organic EL element, and to provide an organic EL element using the same.SOLUTION : There is provided an element having a layer containing 3, 5-dipyridyl phenyl derivative represented by the following formula (1) in an organic EL element made by laminating at least one organic layer between a pair of elements. In the formula, X, Rto Rand Rto Rare groups selected from a specific group independently. |
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