Patent ID: 9574049
Date: 2017-02-21
CPC Classifications: C08G,C09K,H01L,H05B

Claim:
1. An optical device comprising an anode, a cathode and a terpolymer located between the anode and cathode, the terpolymer comprising an optionally substituted repeat unit of formula (II): wherein each R is independently selected from hydrogen, alkyl, and alkoxy and the group of formula(II) is present in a molar ratio of 2.5% to 5%, and there are no repeat units comprising nitrogen atoms in the repeat unit backbone other than the repeat unit of formula (II), the terpolymer further comprising a first repeat unit selected from the group consisting of optionally substituted 9,9-dialkyl-2,7-fluorenyl and 9,9-dialkoxy-2,7-fluorenyl and less than 50 mol % of a second repeat unit selected from the group consisting of optionally substituted repeat units of formula (III): wherein each R