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320-nm Flexible Solution-Processed 2,7-dioctyl[1] benzothieno[3,2-b]benzothiophene Transistors

Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology, Northeast Normal University, Ministry of Education, Changchun 130024, China
Author to whom correspondence should be addressed.
Materials 2017, 10(8), 918;
Received: 30 May 2017 / Revised: 18 July 2017 / Accepted: 2 August 2017 / Published: 9 August 2017
(This article belongs to the Special Issue Highly Ordered Organic Thin Films)
PDF [4252 KB, uploaded 9 August 2017]


Flexible organic thin-film transistors (OTFTs) have received extensive attention due to their outstanding advantages such as light weight, low cost, flexibility, large-area fabrication, and compatibility with solution-processed techniques. However, compared with a rigid substrate, it still remains a challenge to obtain good device performance by directly depositing solution-processed organic semiconductors onto an ultrathin plastic substrate. In this work, ultrathin flexible OTFTs are successfully fabricated based on spin-coated 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (C8-BTBT) films. The resulting device thickness is only ~320 nm, so the device has the ability to adhere well to a three-dimension curved surface. The ultrathin C8-BTBT OTFTs exhibit a mobility as high as 4.36 cm2 V−1 s−1 and an on/off current ratio of over 106. These results indicate the substantial promise of our ultrathin flexible C8-BTBT OTFTs for next-generation flexible and conformal electronic devices. View Full-Text
Keywords: organic thin-film transistors (OTFTs); ultrathin; flexible; conformal; solution-processed; 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (C8-BTBT) organic thin-film transistors (OTFTs); ultrathin; flexible; conformal; solution-processed; 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (C8-BTBT)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ren, H.; Tang, Q.; Tong, Y.; Liu, Y. 320-nm Flexible Solution-Processed 2,7-dioctyl[1] benzothieno[3,2-b]benzothiophene Transistors. Materials 2017, 10, 918.

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