4results about How to "Reduce quenching" patented technology

This invention provides a fused heterocyclic compound and its organic electroluminescent device, specifically relating to the field of organic electroluminescent materials technology. The fused heterocyclic compound provided by this invention possesses excellent electron transport capabilities, suitable HOMO and LUMO energy levels, and a high triplet energy level, which can reduce the electron transport barrier and improve the balance of electron and hole transport. Simultaneously, it can effectively confine holes within the luminescent layer, increasing the probability of effective exciton recombination, thereby reducing the driving voltage, improving luminous efficiency, and extending device lifetime. Furthermore, this fused heterocyclic compound exhibits strong rigidity and a high glass transition temperature, making it less prone to crystallization and aggregation during vapor deposition, thus possessing good film-forming properties and thermal stability. This improves the stability of organic electroluminescent devices and extends the lifespan of electronic components.

The invention provides an organic electroluminescent material and an organic electroluminescent device comprising the same, and belongs to the field of organic photoelectric materials, and the organic electroluminescent material has a structure shown in a general formula I. The organic electroluminescent material provided by the invention is used as a material of a luminescent layer of the organic electroluminescent device, and the luminescent layer has a good luminescent effect. The driving voltage of the device can be reduced, the maximum external quantum efficiency of the device can be improved, and the phosphorescence lifetime of the device can be prolonged.

The application discloses three designs and synthesis of thermal crosslinking thermal activation delayed fluorescent materials based on styrene groups and research thereof, relates to the technical field of fluorescent non-conjugated polymers, and the polymer is homopolymerized by using dendritic macromonomer with styrene at both ends, and different peripheral groups are adopted to encapsulate the dendritic core. The synthesis method comprises Suzuki coupling reaction, methylation reaction and nucleophilic substitution reaction. Research shows that the quenching phenomenon of the encapsulated dendritic TADF triplet exciton is significantly inhibited. The good solubility of the polymer enables the polymer to be applied to solution processing OLED devices. In addition, the dendritic monomer is polymerized by using an in-situ polymerization mode, the polymerization reaction yield of the AIBN initiator is avoided, and the reaction cost and reaction time are greatly saved. The obtained polymer is used to manufacture non-doped OLED devices, and the OLED devices exhibit excellent electroluminescent performance. The research shows certain potential for meeting the market demand of high-performance and low-cost OLEDs.

This invention relates to the field of organic electroluminescent materials, specifically to an iridium metal complex, and more particularly to an iridium metal complex for deep red-near-infrared emission and its applications, as well as organic electroluminescent devices using the iridium metal complex of this invention. The iridium metal complex of this invention has the structure shown in formula (1). OLED devices prepared using the iridium metal complex of this invention exhibit higher luminous efficiency and better lifespan, demonstrating promising application prospects.