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Issue 7, 2015
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N,N′-Dihydrotetraazapentacenes (DHTA) in thin film transistors

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The synthesis and structural properties of three N,N′-dihydrotetraazapentacenes (DHTA) are described. The different substitution pattern (H, F, Cl) of the dihydrotetraazapentacene body exhibited a significant effect on the optical, electronic and morphological properties of the derivatives in thin films. The synthesised materials were investigated as active layers in top gate/bottom contact (BC/TG) transistors. The transistor performance of the dichlorinated derivative was almost independent on the processing conditions with an average hole mobility of ∼0.04 cm2 V−1 s−1 and best mobility values ranging from 0.07 to 0.11 cm2 V−1 s−1. Each of the three derivatives was found to exhibit an individual packing motif in solution grown crystals, determined by single crystal X-ray analysis. Surprisingly, for all three materials a different polymorph formed in spin cast films explaining the observed morphology and FET performance.

Graphical abstract: N,N′-Dihydrotetraazapentacenes (DHTA) in thin film transistors

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The article was received on 24 Oct 2014, accepted on 14 Dec 2014 and first published on 18 Dec 2014

Article type: Paper
DOI: 10.1039/C4TC02426E
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. C, 2015,3, 1604-1609
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    N,N′-Dihydrotetraazapentacenes (DHTA) in thin film transistors

    F. Paulus, B. D. Lindner, H. Reiß, F. Rominger, A. Leineweber, Y. Vaynzof, H. Sirringhaus and U. H. F. Bunz, J. Mater. Chem. C, 2015, 3, 1604
    DOI: 10.1039/C4TC02426E

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