Polymer and organic light-emitting device

摘要

A composition comprising a polymer and a phosphorescent material wherein the polymer comprises repeat units of formula (I):
wherein A is a heteroaryl group containing a nitrogen atom, and A may be unusubstituted or substituted with one or more substituents;
R 1 in each occurrence is independently a substituent; and
n is 0, 1, 2, 3 or 4.