A light-emitting element with high emission efficiency. The light-emitting element includes a pair of electrodes and an EL layer between the pair of electrodes. In the light-emitting element, the EL layer contains at least a light-emitting material, the light-emitting material is a 1,6-bis(diphenylamino)pyrene derivative, and a structural change between an excited state and a ground state in the 1,6-bis(diphenylamino)pyrene derivative is smaller than that in a 1,6-bis(diphenylamino)pyrene derivative in which hydrogen is bonded to ortho positions of two phenyl groups of each of two diphenylamino groups.
一个发光效率高的发光元件。该发光元件包括一对电极和一对电极之间的EL层。在发光元件中,EL层包含至少一种
发光材料,
发光材料为1,6-双(二苯基
氨基)
芘衍
生物,且1,6-双(二苯基
氨基)
芘衍
生物在激发态和基态之间的结构变化小于在每个二苯基
氨基组的两个苯基的邻位上连接氢的1,6-双(二苯基
氨基)
芘衍
生物。