| 摘要 |
<p>An organic electroluminescent element which can be operated at a low voltage is provided. The invention is to further obtain light sources, which take advantage of the feature of a surface light emitter, for flat-panel displays for low-power-consumption OA computers, wall-mounting TVs, etc. or for display panels, marker lamps and copiers, and for backlights of liquid-crystal displays and instruments, etc., by using the element. The present invention relates to an organic electroluminescent element which comprises two or more hole injection/transport layers each formed by a wet film formation method using a composition containing, as a hole-injecting/transporting compound, an arylamine polymer compound that has a repeating unit having a triarylamine structure therein, in which when the number of atoms present on the path which is the smallest in the number of atoms present thereon, of the paths which each connect the nonaromatic tertiary nitrogen atoms contained in any two triarylamine structures present in each polymer compound, is taken as N: the minimum number of atoms between nitrogen atoms in the compound, then the N in each hole injection/transport layer is in a specific state.</p> |
