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Issue 37, 2017
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Photo-switchable field-effect transistors based on two-dimensional stilbene oligomer crystals

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Abstract

We demonstrate the utilization of photochromic two-dimensional (2D) organic single crystals as the channel of organic field-effect transistors (OFETs). High-quality millimeter-sized 2D crystals of semiconducting 1,4-bis(4-methylstyryl)benzene (p-MSB) are grown via a simple one-step interfacial self-assembly method. A typical photo-switching behavior is observed, and the drain current can be reversibly modulated by the alternation of low-intensity irradiation (395 nm) and dark storage, confirming the occurrence of transcis photoisomerization of stilbene in the 2D-crystalline phase. As a comparison, different photoresponsive behaviors are observed in OFETs based on bulk p-MSB crystals, indicating that highly efficient photoisomerization and photo-switching behavior occur when the crystal thickness of the conduction channel decreases down to a few molecular layers.

Graphical abstract: Photo-switchable field-effect transistors based on two-dimensional stilbene oligomer crystals

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Publication details

The article was received on 17 Jul 2017, accepted on 26 Aug 2017 and first published on 29 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC03190D
Citation: J. Mater. Chem. C, 2017,5, 9597-9601
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    Photo-switchable field-effect transistors based on two-dimensional stilbene oligomer crystals

    M. Cao, Z. Cai, X. Chen, K. Yi and D. Wei, J. Mater. Chem. C, 2017, 5, 9597
    DOI: 10.1039/C7TC03190D

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