| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an organic electroluminescent element capable of driving at low voltage, and to obtain a light source utilizing characteristics as a surface emitter such as a flat panel display for a low power consumption OA computer and a wall-mounted television, a display plate, light source for a maker lamp and a copy machine, backlight sources for a liquid crystal display and instruments, by utilizing the element. <P>SOLUTION: In an organic electroluminescent element, in a case that there are three or more hole injection transport layers formed and obtained by using a composition containing arylamine high molecular compound having a tertiary arylamine structure in repeating units as a hole injection transport compound and by the wet deposition method, when the number of atoms on a route that has the smallest number of atoms thereon among routes for connecting tertiary nitrogen atoms having no aromaticity in optional two tertiary arylamine structures existing in high molecular compound, is set to be a " N: a minimum number between nitrogen atoms ", N in each of hole injection transport layers is in a certain state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
