Patent ID: 7001678

Claim:
A composition comprising a polymer blend including a luminescent polymer and a second polymer, wherein at least one polymer is crosslinked and the crosslinked polymer comprises units having the formula wherein: Q 1 comprises at least one aryl or heteroaryl group; Q 2 comprises at least one aryl or heteroaryl group; X 1 is O bonded directly to an aryl carbon of Q 1 ; X 2 is O bonded directly to an aryl carbon of Q 2 ; Z is a linker comprising at least one —(C(R 2 ) 2 )—group; Y is a single bond or a linker group; R 1 is independently at each occurrence H, a halogen, an alkyl group, a heteroalkyl group, an aryl group, or a heteroaryl group; R 2 is independently at each occurrence H, an alkyl group, or a heteroalkyl group; and R 7 comprises a crosslinked group.