2 results about "Intermolecular charge transfer" patented technology

The present application relates to the field of photoelectric technology, especially to organic light-emitting material, organic electroluminescent device and preparation thereof. The organic light-emitting material based on acephenanthrylene derivative and the organic electroluminescent device thereof, the material is fused through benzene ring, ensures that the excited state has high oscillator strength, is conducive to radiation transition, and the rigid fused ring structure can effectively inhibit intramolecular vibration, helps to inhibit the non-radiative transition behavior of the excited state and obtain high photoluminescence efficiency, in addition, the molecule can form intermolecular charge transfer aggregate to reduce the non-adiabatic coupling of electrons, so as to realize low non-radiative transition rate, further improve the photoluminescence efficiency, and also can stabilize the excited state energy, can be further applied to organic electroluminescent device, realizes high electroluminescence efficiency.

The invention provides an organic framework fluorescent material based on a pi bond. Aromatic units with electron pushing and pulling properties are combined to serve as basic units, and the Pi-bond organic framework material with excellent luminescent properties is constructed in a crystallization mode. The solid powder quantum yield of the organic framework fluorescent material BCZ-TRZ based on the pi bond is close to 100%, and is obviously higher than that of most existing framework structure luminescent materials. Benefited from the rigid plane structures of the BCZ and the TRZ, a good charge transfer effect between molecules is achieved. Particularly, through a framework structure constructed among molecules, the molecules are firmly locked, the vibration inactivation of the molecules is fully inhibited, and the quantum yield is extremely high. The Pi-bond-constructed pure organic framework with 100% quantum yield is reported for the first time, and the Pi-bond-constructed pure organic framework has a good application prospect.