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Polystyrene with methoxytriphenylamine-conjugated-thiophene moiety side-chain as a dopant-free hole-transporting material for perovskite solar cells

Abstract

A novel side-chain polymer was designed and synthesized by integrating a methoxytriphenylamine-conjugated-thiophene moiety as the hole transporting material (HTM) unit on a polystyrene side-chain (HTM-P1) by the radical polymerization of its relevant monomer (HTM-M1). These two materials and their similar model compound without the styrene moieties (HTM2) were used as the HTMs for perovskite solar cells (PSCs). Results showed that with the similar device preparation and measurement conditions, the hole mobility of polymer HTM-P1 was about 3 times and 2.5 times of that of HTM2 and HTM-M1, respectively. PSCs based on HTM-P1 as the dopant-free HTM affords an impressive highest power conversion efficiency of 17.2%, which is much higher than that obtained from HTM2 (3.2 % without dopant, 14.7% with dopant) and HTM-M1 (9.7 %). Moreover, the devices based on the HTM-P1 presented significant higher stability than the device based on its model compound of HTM2. Hence, this study demonstrates that the side-chain polymer strategy is an effective approach to achieve high efficiency and highly stable PSCs using dopant-free HTMs.

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Publication details

The article was received on 30 Mar 2018, accepted on 05 Jun 2018 and first published on 06 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA02960A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Polystyrene with methoxytriphenylamine-conjugated-thiophene moiety side-chain as a dopant-free hole-transporting material for perovskite solar cells

    J. Wu, C. Liu, M. Hu, X. Deng, W. Tan, Y. Tian and B. Xu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02960A

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