Red electroluminescence from a 1,4-diketopyrrolo[3,4-c]pyrrole (DPP)-based conjugated polymer

A new hairy rod-type conjugated polymer consisting of alternating N-alkylated diketopyrrolopyrrole diphenylene and alkoxy-substitued phenylene units in the backbone is described. The polymer exhibits a characteristic bright red photo- and electroluminescence with maximum at about 640 nm. The luminescence behaviour is characterised in detail. (C) 2002 Elsevier Science B.V. All rights reserved.