Patent ID: 7214763
Filing Date: 2007-05-08
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 Formula I and I(a) and the at least one second monomeric unit is selected from fused ring aromatic groups having Formula VI, where: in each of Formulae I, I(a), VI, VII, and VIII: 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  wherein in each of Formulae VI, VII, and VIII: 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 VI; the two E's are in the 1,4-, 1,5-, 1,8-, 2,3-, or 2,6- positions; in Formula VII; the two E's are in the 1,4-, 1,5-, 1,8-, 2,3-, 2,6-, or 9,10- positions; in Formula VIII; a first E is in the 1, 2, or 3 position, a second E is in the 6, 7, or 8 position; and with the proviso that when R in formulae VI, VII, and VIII is hydrogen, alkyl, F, —CN, —OR and with the further proviso that said copolymer does not consist of 9,9-di-n-octylfluorene and unsubstituted naphthalene alternating copolymer.