Hole transport polymers and devices made with such polymers

An organic electronic device comprising an active layer between an anode and a cathode, wherein the device further comprises at least one hole-transporting polymer, comprising a polymeric backbone having linked thereto a plurality of substituents comprising fused aromatic ring groups with the proviso that the polymer does not contain groups selected from triarylamines and carbazole groups, and wherein the polymeric backbone is selected from polyacrylates, polymethacrylates, polyaramides, polystyrenes, polyarylenes, polyesters, polyvinylenes, polyvinyl ethers and polyvinyl esters,

• wherein the hole-transporting polymer has the formula Pol-R3—Ar, where Pol represents the polymeric backbone, Ar represents the fused aromatic ring, and R3 represents a linkage resulting from the reaction of a first type reactive group and a second type reactive group,
• wherein the first type and second type reactive groups are selected from the group consisting of carboxylic acid and amino groups;
• hydroxyl and acid chloride groups;
• hydroxyl and carboxylic acid groups;
• isocyanate and hydroxyl groups;
• isocyanate and amine groups;
• epoxy and amine groups;
• acid chloride and amine groups;
• sulfonic acid and amine groups;
• sulfonic acid chloride and hydroxyl groups;
• aldehyde and amino groups;
• aldehyde and carboxyl groups;
• aldehyde and hydroxyl groups;
• and aldehyde and methylketone groups.