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

作者：Guo Chang; Quinn Jesse; Sun Bin; Li Yuning^*

来源：Journal of Materials Chemistry C, 2015, 3(20): 5226-5232.

DOI：10.1039/c5tc00512d

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 degrees 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 degrees C showed an electron mobility of up to similar to 6 x 10(-3) cm(2) 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.

• 出版日期2015