2results about How to "Limit loss" patented technology

This invention provides a carbazole compound and its organic electroluminescent device, specifically relating to the field of organic optoelectronic materials technology. When used as the host material of the emitting layer in an organic light-emitting device, the compound of this invention can improve the mobility of charged holes in the host material, enhancing the exciton recombination effect; simultaneously, it achieves efficient energy transfer from the host material to the doped material, and limits energy loss caused by energy backflow or exciton diffusion, thus improving the device's light-emitting performance. The compound of this invention exhibits good film-forming properties and thermal stability. When used as a capping layer, it can improve optical efficiency and reduce light loss reflected by nearby electrodes during emission, thereby improving device performance. The preparation method of the compound of this invention is simple, the raw materials are readily available, and it can be widely applied in fields such as organic thin-film transistors and panel displays, showing good application effects and industrialization prospects.

A biomimetic silicification-enhanced catalyst and its preparation method are disclosed. The preparation method includes the following steps: S1: Urea, iron salt, and copper salt are added to a first solvent to obtain a mixed solution; S2: The mixed solution undergoes a hydrothermal reflux reaction to obtain particle units; S3: The particle units undergo a silicification reaction with ammonia and a silica precursor to obtain a catalyst. The catalyst prepared by this method can not only reduce its band gap by copper doping to utilize visible light as a reaction light source and reduce reaction conditions, but also inhibit the aggregation of catalyst particles by utilizing the mesoporous silica layer on the surface, expose more reaction sites, and limit the heat loss of the internal particle units, thereby increasing the reaction temperature. This can effectively improve the organic matter treatment effect of the catalyst. It adsorbs and degrades dyes in wastewater through two modes: electrostatic attraction and catalytic decomposition of hydrogen peroxide to generate strong oxidizing free radicals.