| abstract |
Polymers comprising repeating units of formula (I) (I) Wherein R < 1 > is independently in each occurrence H or a substituent, and two groups R < 1 > may be joined to form a ring; R 2 is independently in each occurrence a substituent; Ar 1 is independently in each occurrence an aryl or heteroaryl group which may be unsubstituted or substituted by one or more substituents; R 3 is independently in each occurrence a substituent; Each n is independently 0, 1, 2 or 3, provided that at least one n is 1; Each m is independently 0 or 1. The polymer may be the light emitting layer 103 of the organic light emitting device. |