| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an organic electroluminescent element in which superior electroluminescence can be obtained surely, and to provide an organic electroluminescent element obtained by the above method, and an impurity content determination method of aliphatic ketone solvent for manufacturing an organic electgroluminescent element where an element that is superior in luminance emitting efficiency can be obtained. <P>SOLUTION: The manufacturing method of an organic electroluminescent element includes a process, in which an organic compound layer is formed by using an organic compound layer coating liquid containing an organic compound and an aliphatic ketone solvent, and the aliphatic ketone solvent is set to a content for ketone group impurities of 0.01 wt.% or lower. An impurity content determination method for the aliphatic ketone solvent includes a process, in which the ketone group impurity content in the aliphatic ketone solvent is measured and determination is made as to whether the content is less than the predetermined value. <P>COPYRIGHT: (C)2008,JPO&INPIT |
