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Issue 6, 2016
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The effect of tuning the microstructure of TIPS-tetraazapentacene on the performance of solution processed thin film transistors

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Abstract

We report a comprehensive study of the symmetrical 6,13-bis(triisopropylsilylethynyl)tetraazapentacene (TIPS-TAP) used as an electron transporting material in organic field-effect transistors. We study the optical, electronic, structural and morphological properties of thin films of TIPS-TAP as deposited by spin-coating and zone-casting techniques. Depending on the solution processing conditions and procedures we find a variety of microstructures for TIPS-TAP ranging from highly polycrystalline to well-aligned crystalline films. Field-effect transistors are fabricated in two different architectures to evaluate the charge transport properties of TIPS-TAP in such films, and bias-stress experiments reveal a good electric stability of TIPS-TAP. The extracted electron mobilities vary over several orders of magnitude depending on the resulting morphology of the active layer reaching a maximum of 0.42 cm2 V−1 s−1 for uniaxial aligned crystallites in zone-cast transistors.

Graphical abstract: The effect of tuning the microstructure of TIPS-tetraazapentacene on the performance of solution processed thin film transistors

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Publication details

The article was received on 14 Oct 2015, accepted on 03 Jan 2016 and first published on 04 Jan 2016


Article type: Paper
DOI: 10.1039/C5TC03326H
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. C, 2016,4, 1194-1200
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    The effect of tuning the microstructure of TIPS-tetraazapentacene on the performance of solution processed thin film transistors

    F. Paulus, J. U. Engelhart, P. E. Hopkinson, C. Schimpf, A. Leineweber, H. Sirringhaus, Y. Vaynzof and U. H. F. Bunz, J. Mater. Chem. C, 2016, 4, 1194
    DOI: 10.1039/C5TC03326H

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