LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC APPARATUS AND LIGHT DEVICE

摘要

Disclosed is a light-emitting element having high emission efficiency, capable of driving at low voltage, and showing a long lifetime. The light-emitting element contains a compound between a pair of electrodes, and the compound is configured to give a first peak of m/z around 202 and a second peak of m/z around 227 in a mass spectrum. The first and second peaks are product ions of the compound and possess compositions of C16H9 and C17H10N, respectively, which are derived from a dibenzo[f,h]quinoline unit.