Berlin 2018 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 25: Organic Thin Films, Organic-Inorganic Interfaces: Session I (joint session DS/CPP)

DS 25.7: Vortrag

Mittwoch, 14. März 2018, 18:00–18:15, H 0111

Nanoporous thin films of organic semiconductors for gas sensing applications — •Jean-Nicolas Tisserant, Wolfgang Kowalsky, and Robert Lovrincic — TU Braunschweig, Institut für Hochfrequenztechnik c/o InnovationLab, Speyerer Str. 4 69115 Heidelberg

Organic semiconducting devices could find applications in high added-value products such as efficient sensors for the detection of toxic gases.(1) Nanoporous morphologies are particularly interesting in this scope because they offer enhanced interfacial areas compared to the corresponding planar materials. Processes such as the diffusion of an analyte molecule to the active area of a gas sensor (2) may thus be improved proportionally to the amount of interface added. We propose to use nanoporous thin films of semiconductors in an organic field-effect transistor (OFET) for sensing of an endocrine disruptor in air. In the strategy that we follow, organic semiconducting molecules were self-assembled into nanoporous 2D films following a recently developed method.(3,4) These films were biased in an OFET configuration to build an indirect sensor in which the non-covalent interaction between a sensing dielectric and the target molecule modifies the electrical characteristics of the transistor.

References: (1)Zhang, C., Chen, P. & Hu, W. Chem. Soc. Rev. 44, 2087-2107 (2015); (2)Zhang, F., Qu, G., Mohammadi, E., Mei, J. & Diao, Y. Adv. Funct. Mater. 27, 17-20 (2017); (3)Tisserant, J. N. et al. RSC Adv. 6, 23141-23147 (2016); (4)Tisserant, J.-N. et al. ACS Appl. Mater. Interfaces 9, 27166-27172 (2017)