| abstract |
The present invention relates to spirobifluorene compounds for use in light-emitting devices. relates to a compound represented by formula (II), Chemical formula (II), wherein B 1 is hydrogen and B 2 is a heterocyclic group selected from the group consisting of carbazole, dibenzothiophene, dibenzofuran, acridine, dibenzothirole and biphenyl Pyridine, each of these optionally substituted with one or more substituents other than hydrogen; r is an integer from 0 to 3 ; X to X are independently selected from substituents other than spirobifluorenyl, m is an integer from 0 to 3, and p and q are integers from 0 to 4. and the use of such compounds in OLEDs. |