Patent ID: 7767776
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A copolymer prepared for use in a charge transport layer in an opto-electronic device and in particular in a light-emitting diode (LED), having a charge mobility of at least 1.0×10 −10 m 2 /V.s, and comprising at least a first and a second monomer, characterized in that the ratio of the solubilities of homopolymers made from the first and the second monomer in a first solvent is more than 10, wherein the homopolymers of the first and the second monomer are 2,5-bis(2′-ethylhexyloxy)-1,4-phenylenevinylene and 2,5-bis(butoxy)-1,4-phenylenevinylene, respectively, and the ratio of the first to the second monomer is between 1:1 and 1:3.