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Hydrogen-Bonding as Supramolecular tool for Robust OFET Devices.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Hydrogen-Bonding as Supramolecular tool for Robust OFET Devices."

In the present study, we demonstrated the effect of H-bonding in the semiconducting behaviour of a small molecule used in organic field-effect transistors (OFETs). For this study, a highly soluble dumbbell-shaped molecule, t-Boc-TATDPP based on t-Boc protected thiophene-DPP and triazatruxene (TAT) moieties was used. Two t-Boc groups of the molecule were removed by annealing at 200 oC which created a strong H-bonded network of NH-TATDPP supported by additional π-π stacking. These were characterised by TGA, UV-vis, IR, XRD and HR-TEM measurements. FETs were fabricated with a semiconducting channel made of t-Boc-TATDPP and NH-TATDPP separately. It is worth mentioning that the t-Boc-TATDPP film can be cast from solution and then it was annealed to get the other systems with NH-TATDPP, which makes easy to process the films with vacuum evaporation. More importantly, NH-TATDPP showed significantly higher hole mobilities compared to t-Boc-TATDPP. Interestingly, the high hole mobility in the case of NH-TATDPP was unaffected upon blending with PC71BM. Thus, this robust hydrogen-bonded supramolecular network is likely to be useful in designing efficient and stable organic optoelectronic devices.

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This article was published in the following journal.

Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
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