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Synchronously improved stretchability and mobility by tuning the molecular weight for intrinsically stretchable transistors

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Abstract

Commercial applications of skin-like electronic devices for healthcare, intelligent robotics and electronic communication require large-scale high-density transistor arrays with high mechanical deformability and robustness that can be provided by intrinsically stretchable transistors. However, the contradictory crystallinity-dominated mobility and stretchability in the currently reported polymer semiconductors result in extremely limited high-mobility intrinsically stretchable transistors. Herein, based on a polymer with strong intrachain transport, we pioneer the use of molecular weight modulation to synchronously achieve increased mobility from 0.56 to 1.95 cm2 V−1 s−1 and increased crack-onset strain from 26 to 97% in the PIDTBT film. Based on the molecular weight modulation, a high-performance intrinsically stretchable transistor array with stretchability up to 100 percent strain and mobility up to 1.84 cm2 V−1 s−1, was demonstrated. Moreover, the stretchable transistor array presents a device density as high as 375 devices per square centimeter and good electrical performance at the static and dynamic stretching strain. Our results provide a new strategy for creating intrinsically stretchable transistors with high mobility and present unprecedented opportunities for large-scale high-density production of next-generation stretchable electronics.

Graphical abstract: Synchronously improved stretchability and mobility by tuning the molecular weight for intrinsically stretchable transistors

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Article information


Submitted
17 May 2020
Accepted
16 Jul 2020
First published
18 Jul 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Synchronously improved stretchability and mobility by tuning the molecular weight for intrinsically stretchable transistors

H. Ren, J. Zhang, Y. Tong, J. Zhang, X. Zhao, N. Cui, Y. Li, X. Ye, Q. Tang and Y. Liu, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC02363A

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