93results about How to "Increase HOMO level" patented technology

The invention discloses a fused ring compound. The fused ring compound has the structure as shown in a formula (I) or a formula (II). The fused ring compound is favorable for balancing electronic transmission property while improving the cavitation performance by controlling effective conjugation of an aromatic ring and a heterocyclic ring; and the compound has high three linear energy level and vitreous transition temperature, the material molecules are not liable to crystallization, and the compound serving as a main body material of a light-emitting layer can guarantee that the energy is efficiently transmitted to an object material. The substituent group of the fusing ring compound is adjusted, so that the transmission performance of electrons and cavities is further improved, single linear and three linear energy level difference is reduced, the composite area of a current carrier is widened and three linear exciton annihilation is avoided. The invention also discloses an organicelectroluminescence device; at least one functional layer comprises the fused ring compound; the fused ring compound serves as the main body material of the light-emitting layer and is matched with the energy level of the adjacent current carrier transmission layer; and the driving voltage of the device is reduced while the light-emitting efficiency of the device is improved.

The invention discloses a dibenzo-heterocyclic compound, which has a structure represented by the formula (I). The LUMO energy level of the dibenzo-heterocyclic compound is low, the dibenzo-heterocyclic compound can be well matched with an electron transport material, and the electron injection and transportation are promoted. The dibenzo-heterocyclic compound has a good hole transport performance, is capable of balancing the ratio of electrons / holes in a luminous layer when being used as a luminous layer material, increases the compounding probability, and improves the luminous efficiency. Due to the spatial configuration of the dibenzo-heterocyclic compound, molecule stacking is avoided, the generation of high energy exciton generated by energy transmission between molecules is prevented, annihilation of exciton is inhibited, and the roll-off is inhibited. At the same time, the dibenzo-heterocyclic compound has good thermal stability and is capable of efficiently and stably emittingblue light. The invention also discloses an organic electroluminescent device, at least one functional layer of the device comprises the dibenzo-heterocyclic compound, and the blue light device has the advantages of high blue light luminous efficiency and low work voltage.