| abstract |
An embodiment of the present invention provides an organic electroluminescence device, comprising a light-emitting layer, the light-emitting layer comprising a host material and a dye, the host material is a triplet-triplet annihilation material, and the triplet-triplet state The first triplet energy level of the annihilation host material is lower than the first triplet energy level of the dye, and the dye has the structure shown in formula (1). An organic electroluminescence device provided by the present invention, wherein The triplet-triplet annihilation material is used as the host material in the light-emitting layer, and the dye with the structure shown in formula 1 is used. Since the dye has the special structure shown in formula 1, and a specific triplet-triplet annihilation material is used as the host material , which effectively improves the stability and luminous efficiency of the device. In addition, the use of such a combination in the light-emitting layer effectively increases the lifespan of the organic electroluminescent device and reduces the driving voltage of the device. |