| abstract |
Provided is an organic electroluminescence device having high luminous efficiency (for example, external quantum efficiency), high durability, and little chromaticity shift after device degradation. Moreover, provision of an organic electroluminescent element material suitable for use therein. For example, an organic electroluminescent element material comprising a metal complex having a neopentyl group as described below. An organic electroluminescent element having a pair of electrodes on a substrate and at least one organic layer including a light emitting layer between the electrodes, the organic electroluminescent element material being contained in any one of the organic layers Organic electroluminescent device. [Selection] Figure 1 |