Precise design of organic semiconductors based on 1,2-diketone rylenimide assemblies for (opto)electronic devices.
Matías Jesús Alonso-Navarro a b, M. Mar Ramos b, José L. Segura a
a Department of Organic Chemistry, Faculty of Chemistry, Complutense University of Madrid (UCM).
b Chemical and Environmental Technology Department, Rey Juan Carlos University (URJC).
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Oral, Matías Jesús Alonso-Navarro, presentation 118
Publication date: 20th April 2022

In this communication, we summarize different approaches developed in our research group to tune effectively the electrochemical, optical and morphological characteristics of rylenimide-based organic semiconductors for their use in (opto)electronic devices including organic solar cells (OSCs) [1].

Different variables were finely tuned in these organic assemblies, such as the length of the π-conjugated backbones [2,3], the energy levels and topologies  of the frontier molecular orbitals and their shape and dimensionality. By using atomic force microscopy (AFM) and X-ray diffraction (XRD) in thin films we correlate these tunable properties with the microstructure observed. The versatility of 1,2-diketone functionality allows us the design not only n-type organic semiconductors but also ambipolar materials by combining electron-withdrawing structures with electron-donor moieties. We will highlight our most recent studies on the use of different end-capped substituents [4] and the effect of structural dimensionality [5] in the performance in OSC of some ambipolar and n-type semiconductor materials based on π-conjugated rylenimides.

This work was financially supported by MICINN (PID2019-106268GB-C33) and the UCM (INV.GR.00.1819.10759). MJAN gratefully acknowledges Universidad Rey Juan Carlos for a postdoctoral contract.

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