Provided is an electroluminescent device comprising an organic layer interposed between an anode and a cathode on a substrate, wherein the organic layer includes an electroluminescent layer containing one or more dopant compound(s) represented by Chemical Formula 1, and the dopant compound is a mixture of not less than 80% by weight and less than 100% by weight of the cis-form and more than 0% by weight and not more than 20% by weight of the trans-form:
wherein represents cis or trans configuration to the double bond.
The electroluminescent device, which includes a mixture of not less than 80% by weight and less than 100% by weight of a dopant having cis configuration and more than 0% by weight and not more than 20% by weight of the dopant having trans configuration, exhibits superior luminous efficiency, good color purity and excellent operation life.
本发明提供了一种电致发光器件,该器件包括一个有机层,该有机层插接在基底上的阳极和阴极之间,其中有机层包括一个电致发光层,该电致发光层含有一个或多个由
化学式 1 表示的掺杂化合物,并且该掺杂化合物是一种混合物,其中顺式化合物的重量不小于 80% 且不小于 100%,反式化合物的重量大于 0% 且不大于 20%:
其中代表双键的顺式或反式构型。
该电致发光器件包括顺式构型的掺杂剂不小于 80%(按重量计)和不小于 100%(按重量计)的混合物,以及反式构型的掺杂剂大于 0%(按重量计)和不大于 20%(按重量计)的混合物,具有卓越的发光效率、良好的色纯度和出色的使用寿命。