LUMINESCENT ELEMENT AND DISPLAY

摘要

A luminescent element having a cathode, an anode and, arranged between them, one or a plurality of layers of organic thin films, characterized in that at least one of the layers is a light emitting layer which comprises a luminescent molecule of a metal coordination compound having a basic structure represented by the following general formula (1) and having a substituent on at least one of cyclic groups A and B as a guest in a host material at an concentration which is 8 wt % or greater and is greater than a concentration at which a luminescent molecule of a compound having a structure analogous to the above and free of the substituent exhibits the maximum luminous efficiency. The luminescent element is less susceptible to extinction by concentration even when used at a high concentration in a host material and thus exhibits high efficiency. (1)