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

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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

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Publication details

The article was received on 08 Jun 2017, accepted on 04 Aug 2017 and first published on 07 Aug 2017


Article type: Research Article
DOI: 10.1039/C7QM00261K
Citation: Mater. Chem. Front., 2017, Advance Article
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    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, Advance Article , DOI: 10.1039/C7QM00261K

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