| 摘要 |
Novel compounds containing substituted oligoazacarbazole chains are provided. Y- X-Z, wherein Y is selected from the group consisting of: A- B -C-D- A -B-C- A-B- wherein A, B, C, and D are independently selected from the compound of formula (I) wherein X is an aryl or heteroaryl linker that is optiorially further substituted; wherein Y and X are connected through a C-N bond; and wherein Z is selected from the group consisting of dibenzothiphene, dibenzofuran, dibenzoselenophene, aza-dibenzothiophene, aza-dibenzofuran, and aza-dibenzoselenophene that is optionally further substituted. These compounds are useful in organic light emitting devices, in particular as hosts in the emissive layer of such devices. |
