Issue 11, 2017

Phase separation and electrical performance of bithienopyrroledione polymer semiconductors embedded in insulating polymers

Abstract

Bithienopyrroledione (1,1′-bithieno[3,4-c]pyrrole-4,4′,6,6′-tetraone (bi-TPD)) based copolymer P1 was synthesized and characterized. Its phase separation characteristics in a P1/PMMA blend were investigated. It was found that P1 formed microsized fibers in the P1/PMMA blend and dispersed into the whole blend system. Thin film field-effect transistors using P1 films and P1/PMMA blend films as active layers were fabricated. Both devices showed p-type charge carrier transport properties under ambient conditions and ambipolar charge carrier transport behavior in a N2 atmosphere. Under ambient conditions, the P1 film transistors displayed a hole mobility of 0.48 cm2 V−1 s−1, and the blend film devices exhibited comparable performance with a hole mobility of 0.32 cm2 V−1 s−1. In a N2 atmosphere, the performance of the blend film transistors was largely improved compared with that of the P1 film ones. The hole/electron mobilities were 0.10/0.05 cm2 V−1 s−1 for the blend film transistors and 0.02/0.002 cm2 V−1 s−1 for the P1 film devices. All these results demonstrate the potential applications of bi-TPD based polymer semiconductors in high performance blend film transistors.

Graphical abstract: Phase separation and electrical performance of bithienopyrroledione polymer semiconductors embedded in insulating polymers

Supplementary files

Article information

Article type
Research Article
Submitted
08 6 2017
Accepted
04 8 2017
First published
07 8 2017

Mater. Chem. Front., 2017,1, 2265-2270

Phase separation and electrical performance of bithienopyrroledione polymer semiconductors embedded in insulating polymers

L. Tang, P. He, X. Qiao, Q. Qian and H. Li, Mater. Chem. Front., 2017, 1, 2265 DOI: 10.1039/C7QM00261K

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