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Issue 20, 2013
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A heterotriangulene polymer for air-stable organic field-effect transistors

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We report on a novel air-stable p-type heterotriangulene polymer (PTA) for large-area organic field-effect transistor (OFET) applications. The newly synthesized amorphous organic semiconductor was characterized concerning morphological, optical, electrical and interface related properties and revealed a saturation mobility of ∼4.2 × 10−3 cm2 V−1 s−1 and an on/off current ratio of ∼105 in bottom-gate/bottom-contact (BG/BC) OFETs. The influence of several interface modifications was investigated in order to optimize the device performance. PTA FETs exhibited excellent air stability over several months and a superior performance compared to the widely used poly(3-hexylthiophene)-based OFETs. Moreover, we show that hydrochloric acid in chloroform leads to protonation of the nitrogen atoms on the PTA polymer, resulting in a significant change of the electrical characteristics of OFETs.

Graphical abstract: A heterotriangulene polymer for air-stable organic field-effect transistors

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Publication details

The article was received on 19 Jan 2013, accepted on 05 Mar 2013 and first published on 10 Apr 2013

Article type: Paper
DOI: 10.1039/C3PY00089C
Citation: Polym. Chem., 2013,4, 5337-5344

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    A heterotriangulene polymer for air-stable organic field-effect transistors

    K. Schmoltner, F. Schlütter, M. Kivala, M. Baumgarten, S. Winkler, R. Trattnig, N. Koch, A. Klug, E. J. W. List and K. Müllen, Polym. Chem., 2013, 4, 5337
    DOI: 10.1039/C3PY00089C

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