Patent ID: 7230070
Filing Date: 2007-06-12
Classification: C08F,C08G,C09K,H01L,H05B,Y02E,Y10T

Abstract:
1. A copolymer consisting essentially of at least one first monomeric unit and at least one second monomeric unit, wherein the at least one first monomeric unit has a Formulae I and I(a) and the at least one second monomeric unit is selected from 6-membered-ring heteroaromatic groups having Formula III where: in each of Formulae I and III: R is a substituent on a carbon atom which can be the same or different at each occurrence and is selected from hydrogen, alkyl, aryl, heteroalkyl, heteroaryl, F, —CN, —OR  or adjacent R groups together can form a 5- or 6-membered cycloalkyl, aryl, or heteroaryl ring,  such that: in Formula III: E can be the same or different at each occurrence and is a single bond or a linking group selected from arylene and heteroarylene; in Formula XII: R δ is 0 or an integer from 1 to 12; with the proviso that: when R in formula III is hydrogen, alkyl, F, —CN, —OR