POLYMER AND ORGANIC LIGHT-EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a composition useful in forming an organic light-emitting device etc.SOLUTION: The present invention provides a phosphorescent material composition comprising a polymer and a phosphorescent material, where the polymer comprises repeat units of the formula (I), where A is a heteroaryl group containing a nitrogen atom, and A may be unsubstituted or substituted with one or more substituents; Rin each occurrence is independently a substituent; and n is between 0 and 4.