49results about How to "High photoluminescence quantum yield" patented technology

The invention belongs to the technical field of organic light-emitting materials, and relates to a fluorescent material, a preparation method and application thereof. The fluorescent material is an excimer compound doped with a fluorescent dopant; the fluorescent dopant is 9,10-bis[ N,N-bis-(p-tolyl)-amino]anthracene or 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethylgiuroni Quanyl-9-alkenyl)-4H-pyrene; the donor of the exciplex is 4,4'-cyclohexylbis[N,N-bis(4-methylphenyl)aniline]; the The receptor for the exciplex is 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole. The fluorescent material can achieve complete transfer of the luminescence peak with a very low concentration (<2wt.%) of dopants, the photoluminescence quantum yield is close to 100%, and can achieve strong up-conversion under the excitation of long-wavelength near-infrared laser light Two-photon fluorescence. At the same time, the fluorescence lifetime of the fluorescent material is shortened by nearly 90% compared with the prior art, which greatly improves the luminescence saturation effect and efficiency of the material, and is an important progress compared with the existing fluorescent material.