Institut Charles Sadron Event

The presence of noncovalent interactions in organic semiconductors has been demonstrated to be beneficial in several applications, resulting in the enhancement of the electrical properties and device efficiencies. Nevertheless, regarding H-bonding, no comparative studies have been performed leading to scattered non-conclusive examples in the literature. Therefore, it is of great interest to develop guidelines to achieve strategic molecular design of ?-conjugated systems, in order to achieve control over the optoelectronic properties and morphology through self-assembly using H-bonding. For this purpose, I have conducted a systematic study of the impact of incorporating H-bonding units in the optoelectronic properties of organic semiconductors using diketopyrrolopyrrole (DPP) as an electroactive model. The systematic study focused on the synthesis of five families of DPP derivatives with different variation in the molecular design such as a topology, position, relative distance, H-bonding unit and the presence of chiral centers. Then, evaluating the optoelectronic properties of the resulting self-assembled systems by optical spectroscopy, electrochemical methods and fabrication of organic electronic devices. Key words: hydrogen bond, diketopyrrolopyrrole, supramolecular interactions, organic electronics