Diketopyrrolopyrole (dpp)-based sensitizers for electrochemical or optoelectronic devices

The present invention relates to compounds of formula (I) based on DPP moiety being useful as metal-free organic sensitizers or dyes of type D-Pi-A in electrochemical or optoelectronic devices, their use as sensitizer or dye and an electrochemical or optoelectronic device comprising a compound of the invention.