Berlin 2024 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Organic Electronics and Photovoltaics I

CPP 18.4: Talk

Tuesday, March 19, 2024, 10:30–10:45, H 0110

Langmuir-Blodgett Prepared PMMA Films For All-Solution-Processed Organic Electronics — •Kirill Gubanov, Christiane Sauer, Fabian Streller, Katharina E. Dehm, Ryan W. Crisp, Dustin Vivod, Dirk Zahn, and Rainer H. Fink — Department of Chemistry and Pharmacy, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany

A variety of organic materials properties offers opportunities to explore new applications required for the production of sustainable, flexible and low-cost electronic circuitry. Solution-based preparation of high structural quality organic thin films may offer access to such devices. Previously, we reported on successful fabrication of 2-Tridecyl-[1]benzothieno[3,2-b][1]benzothiophene (C13-BTBT) semiconductor crystalline thin films produced via self-assembly at liquid-liquid interface, and microprinted PEDOT:PSS polymer electrodes applied in Organic Field-Effect Transistors (OFETs) for charge-injection or extraction. Here, we report on preparation of Polymethyl methacrylate (PMMA) dielectric films of superior structural quality in the monolayer and multilayer regime by the Langmuir-Blodgett method and their successful application in OFETs. A combined study of NEXAFS linear dichroism and Molecular-Dynamics simulations revealed a beneficial for charge transport preferential upright standing molecular orientation for vacuum-sublimated C13-BTBT semiconductor monolayer deposited on such PMMA thin films. Combining all preparation steps above, all-solution processed OFETs can be fabricated. Research is funded by the BMBF (contract 05K19WE2) and SolTech initiative.

Keywords: OFETs; Solution-Processed; Langmuir-Blodgett; X-ray Spectroscopy; Molecular Dynamics