An organic electroluminescent device has a single hetero structure comprising, on a glass substrate, an ITO transparent electrode, a hole transport layer, an electron transport layer and a metal electrode superposed in this order wherein a hole-blocking layer containing a bathophenanthroline derivative of the following general formula is interposed between the hole transport layer and the electron transport layer. In this way, the electron-hole-re-combination in the hole transporting luminescent layer can be promoted.
wherein X and Y may be the same or different and independently represent a hydrogen atom except the case where a hydrogen atom is at the 2 or 9 position, a substituted or unsubstituted alkyl group except the case where a methyl group is at the 2 or 9 position, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted amino group, a halogen atom, a nitro group, a cyano group or a hydroxyl group provided that at least one of these groups is contained at an arbitrary position.
一种有机电致发光器件具有单一的异质结构,在
玻璃基板上依次叠加有 ITO 透明电极、空穴传输层、电子传输层和
金属电极,其中空穴传输层和电子传输层之间夹有含有下通式浴
菲罗啉衍
生物的空穴阻挡层。这样可以促进空穴传输发光层中的电子-空穴再结合。
其中,X 和 Y 可以相同或不同,并独立地代表氢原子(氢原子位于 2 或 9 位的情况除外)、取代或未取代的烷基(甲基位于 2 或 9 位的情况除外)、取代或未取代的环烷基、取代或未取代的芳基、取代或未取代的
氨基、卤素原子、硝基、
氰基或羟基,条件是这些基团中至少有一个位于任意位置。