| abstract |
The present invention relates to a novel heterocyclic spiro ring structure compound, which has a structure as shown in general formula I; in said general formula I, E 1 and E 2 each independently represent an O, S or Se atom, and both are not identical; R 1 , R 2 , R 3 , and R 4 each independently represent an electron-donating or neutral aromatic group containing n benzene rings and/or aromatic heterocycles, or represent an H atom; the n Represents an integer from 1 to 7. The compound provided by the present invention has a spiro ring structure as the main body. The main structure has both a rigid structure and an electron-rich structural unit. It can provide excellent hole transport properties and has good thermal stability. The structure has a suitable HOMO and LUMO energy levels and higher Eg can effectively improve the photoelectric performance and OLED device lifetime. The introduction of electron-donating groups or neutral groups in the structure can be well applied in OLED devices and used as hole transport materials. |