Patent ID: 6514632
Filing Date: 2003-02-04
Classification: C07C,C08G,C09B,C09K,H01L,Y10S

Abstract:
A light-emitting diode comprised of one or more layers of polymer films, at least one of which is prepared from a composition comprising a polymer which has at least ten groups of the formula: and a polydispersity of less than 5, wherein R1 is independently in each occurrence C1-20 hydrocarbyl or C1-20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-16 hydrocarbyl carbonyloxy, C4-16 aryl(trialkylsiloxy) or both R1 may form with the 9-carbon on the fluorene ring a C5-20 ring structure or a C4-20 ring structure containing one or more heteroatoms of S, N or O;R2 is independently in each occurrence C1-20 hydrocarbyl, C1-20 hydrocarbyloxy, C1-20 thioether, C1-20 hydrocarbylcarbonyloxy or cyano; and a is independently in each occurrence 0 or 1 wherein substantially all the polyfluorene groups (IV) are connected through the 2 and 7 carbon atoms and the polymer further comprises at least one additional conjugated comonomer.