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Issue 20, 2015
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An indigo-based polymer bearing thermocleavable side chains for n-type organic thin film transistors

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Abstract

A new n-type semiconducting polymer based on indigo having thermocleavable tert-butoxycarbonyl (t-Boc) groups was synthesized and used as an active layer in organic thin film transistors (OTFTs). Twisting of the polymer main chain due to the presence of the bulky t-Boc groups renders this indigo-based polymer highly soluble. A post-deposition thermal treatment at a temperature above 170 °C could remove the t-Boc groups to retrieve the highly coplanar geometry of the unsubstituted indigo units. The thermally annealed polymer semiconductor films at 200 °C showed an electron mobility of up to ∼6 × 10−3 cm2 V−1 s−1 in OTFTs, which is a 5-fold increase compared to that of the indigo-based polymers reported previously due to the retrieved high backbone coplanarity.

Graphical abstract: An indigo-based polymer bearing thermocleavable side chains for n-type organic thin film transistors

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Article information


Submitted
23 Feb 2015
Accepted
13 Apr 2015
First published
14 Apr 2015

J. Mater. Chem. C, 2015,3, 5226-5232
Article type
Paper
Author version available

An indigo-based polymer bearing thermocleavable side chains for n-type organic thin film transistors

C. Guo, J. Quinn, B. Sun and Y. Li, J. Mater. Chem. C, 2015, 3, 5226
DOI: 10.1039/C5TC00512D

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