|
Authors
|
Liu, K.; Réhault, J.; Liang, B.; Hambsch, M.; Zhang, Y.; Seçkin, S.; Zhou, Y.; Shivhare, R.; Zhang, P.; Polozij, M.; König, T. A. F.; Qi, H.; Zhou, S.; Fery, A.; Mannsfeld, S. C. B.; Kaiser, U.; Heine, T.; Banerji, N.; Dong, R.; Feng, X.
|
|
Title
|
A Quasi-2D Polypyrrole Film with Band-Like Transport Behavior and High Charge-Carrier Mobility
|
|
Date
|
05.10.2023
|
|
Number
|
0
|
|
Abstract
|
Quasi-2D (q2D) conjugated polymers (CPs) are polymers that consist of linear CP chains assembled through non-covalent interactions to form a layered structure. In this work, the synthesis of a novel crystalline q2D polypyrrole (q2DPPy) film at the air/H<sup>2</sup>SO<sub>4</sub> (95%) interface is reported. The unique interfacial environment facilitates chain extension, prevents disorder, and results 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, the temperature-dependent charge-transport properties of q2DPPy are investigated using the van der Pauw (vdP) method and terahertz time-domain spectroscopy (THz-TDS). The vdP method reveals that the q2DPPy film exhibits a semiconducting behavior with a thermally activated hopping mechanism in long-range transport between the electrodes. Conversely, THz-TDS reveals a band-like transport, indicating intrinsic charge transport up to a record short-range high THz mobility of ≈107.1 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>.
|
|
Publisher
|
Advanced Materials
|
|
Wikidata
|
|
|
Citation
|
Advanced Materials 35 (2023) 2303288
|
|
DOI
|
https://doi.org/10.1002/adma.202303288
|
|
Tags
|
|
