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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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Supplementary files

Article information

24 Oct 2014
14 Dec 2014
First published
18 Dec 2014

J. Mater. Chem. C, 2015,3, 1604-1609
Article type
Author version available

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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