申请人:Sumitomo Chemical Company, Limited
公开号:EP3932926A1
公开(公告)日:2022-01-05
To provide a light emitting device excellent in light emission efficiency.
A light emitting device comprising a cathode, a first organic layer containing a compound having a cross-linkable group and a phosphorescent transition metal complex, a second organic layer containing a crosslinked body of the same compound as the above-described compound having a cross-linkable group, and an anode in this order, wherein the ratio of the above-described compound having a cross-linkable group contained in the above-described first organic layer is 2 to 10% by mass with respect to the total mass of the first organic layer. The compound having a cross-linkable group may be a compound having at least one cross-linkable group selected from Group of cross-linkable group consisting of cross-linkable groups represented by the formula (XL-1) to the formula (XL-19) .
提供一种发光效率极佳的发光器件。
一种发光器件,包括阴极、含有具有可交联基团的化合物和磷光过渡金属复合物的第一有机层、含有与上述具有可交联基团的化合物相同的交联体的第二有机层和阳极,其中上述第一有机层中含有的上述具有可交联基团的化合物的质量占第一有机层总质量的比例为 2%至 10%。具有可交联基团的化合物可以是具有至少一个可交联基团的化合物,该可交联基团选自由式(XL-1)至式(XL-19)表示的可交联基团组成的可交联基团组。