A Quasi-2D Polypyrrole Film with Band-Like Transport Behavior And High Charge Carrier Mobility.

Liu, Kejun; Réhault, Julien; Liang, Baokun; Hambsch, Mike; Zhang, Yingying; Seçkin, Sezer; Zhou, Yunxia; Shivhare, Rishi; Zhang, Peng; Polozij, Miroslav; König, Tobias A F; Qi, Haoyuan; Zhou, Shengqiang; Fery, Andreas; Mannsfeld, Stefan C B; Kaiser, Ute; Heine, Thomas; Banerji, Natalie; Dong, Renhao and Feng, Xinliang (2023). A Quasi-2D Polypyrrole Film with Band-Like Transport Behavior And High Charge Carrier Mobility. Advanced materials, 35(40), e2303288. Wiley 10.1002/adma.202303288

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Quasi-two-dimensional conjugated polymers (q2DCPs) are polymers that consist of linear conjugated polymer chains assembled through non-covalent interactions to form a layered structure. In this work, w e report the synthesis of a novel crystalline q2D polypyrrole (q2DPPy) film at an air/H2 SO4 (95%) interface. The unique interfacial environment facilitated chain extension, prevented disorder, and resulted in a crystalline, layered assembly of protonated quinoidal chains with a fully extended conformation in its crystalline domains. This unique structure features highly delocalized π-electron systems within the extended chains, which is responsible for the low effective mass and narrow electronic bandgap. Thus w e investigated the temperature-dependent charge transport properties of q2DPPy using the van der Pauw (vdP) method and terahertz time-domain spectroscopy (THz-TDS). The vdP method revealed that the q2DPPy film exhibited a semiconducting behavior with a thermally activated hopping mechanism in long-range transport between the electrodes. Conversely, THz-TDS revealed a band-like transport, indicating intrinsic charge transport up to a record short-range high THz mobility of ∼107.1 cm2 V-1 s-1 . This article is protected by copyright. All rights reserved.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Liu, Kejun, Réhault, Julien Emile, Shivhare, Rishi Ramdas, Banerji, Natalie


500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
000 Computer science, knowledge & systems








Pubmed Import

Date Deposited:

20 Jul 2023 10:43

Last Modified:

05 Oct 2023 00:13

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Terahertz spectroscopy band-like transport conjugated polymers high mobility polypyrrole film





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