Optically switchable transistors by simple incorporation of photochromic systems into small-molecule semiconducting matrices

Mirella El Gemayel, Karl Börjesson, Martin Herder, Duc T. Duong, James A. Hutchison, Christian Ruzié, Guillaume Schweicher, Alberto Salleo, Yves Geerts, Stefan Hecht (), Emanuele Orgiu () and Paolo Samorì ()
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Mirella El Gemayel: ISIS and icFRC, Université de Strasbourg and CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France
Karl Börjesson: ISIS and icFRC, Université de Strasbourg and CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France
Martin Herder: Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
Duc T. Duong: Stanford University
James A. Hutchison: ISIS and icFRC, Université de Strasbourg and CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France
Christian Ruzié: Laboratoire de Chimie des Polymères, CP 206/01, Faculté des Sciences, Université Libre de Bruxelles (ULB)
Guillaume Schweicher: Laboratoire de Chimie des Polymères, CP 206/01, Faculté des Sciences, Université Libre de Bruxelles (ULB)
Alberto Salleo: Stanford University
Yves Geerts: Laboratoire de Chimie des Polymères, CP 206/01, Faculté des Sciences, Université Libre de Bruxelles (ULB)
Stefan Hecht: Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
Emanuele Orgiu: ISIS and icFRC, Université de Strasbourg and CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France
Paolo Samorì: ISIS and icFRC, Université de Strasbourg and CNRS, 8 allée Gaspard Monge, 67000 Strasbourg, France

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract The fabrication of multifunctional high-performance organic thin-film transistors as key elements in future logic circuits is a major research challenge. Here we demonstrate that a photoresponsive bi-functional field-effect transistor with carrier mobilities exceeding 0.2 cm2 V−1 s−1 can be developed by incorporating photochromic molecules into an organic semiconductor matrix via a single-step solution processing deposition of a two components blend. Tuning the interactions between the photochromic diarylethene system and the organic semiconductor is achieved via ad-hoc side functionalization of the diarylethene. Thereby, a large-scale phase-segregation can be avoided and superior miscibility is provided, while retaining optimal π–π stacking to warrant efficient charge transport and to attenuate the effect of photoinduced switching on the extent of current modulation. This leads to enhanced electrical performance of transistors incorporating small conjugated molecules as compared with polymeric semiconductors. These findings are of interest for the development of high-performing optically gated electronic devices.

Date: 2015
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DOI: 10.1038/ncomms7330

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