| abstract |
The invention discloses a chain compound and an organic electroluminescence display device comprising the same, and belongs to the technical field of organic electroluminescence materials. The maximum linear length of the chain compound is greater than 2.3 nm, and the refractive index at the wavelength of 450 nm is greater than 2.1. The organic electroluminescence display device includes a first electrode, an organic light-emitting layer, a second electrode and a cover layer in contact with the second electrode. , the light is emitted from the cover layer, and the material of the cover layer adopts the above-mentioned chain compound. Compared with the dendrimers, the chain compounds of the present invention have great advantages in light extraction as cover layer materials, can significantly improve the external quantum efficiency, and the obtained organic electroluminescence display device has high luminous efficiency, low driving voltage and long service life. . |