https://scholars.lib.ntu.edu.tw/handle/123456789/576795
標題: | Metal–Ligand Based Mechanophores Enhance Both Mechanical Robustness and Electronic Performance of Polymer Semiconductors | 作者: | Wu, H.-C. Lissel, F. Wang, G.-J. N. Koshy, D. M. Nikzad, S. Yan, H. Xu, J. Luo, S. Matsuhisa, N. Cheng, Y. Wang, F. Ji, B. Li, D. WEN-CHANG CHEN Xue, G. Bao, Z. |
關鍵字: | Complexation; Hall mobility; Hole mobility; Ligands; Metals; Polymers; Thiophene; X ray absorption spectroscopy; Bipyridine ligands; Diketopyrrolopyrroles; Electrical charges; Electronic performance; Grazing incidence X-ray diffraction; Mechanical robustness; Molecular ordering; Polymer semiconductors; Iron compounds | 公開日期: | 2021 | 卷: | 31 | 期: | 11 | 來源出版物: | Advanced Functional Materials | 摘要: | The backbone of diketopyrrolopyrrole-thiophene-vinylene-thiophene-based polymer semiconductors (PSCs) is modified with pyridine (Py) or bipyridine ligands to complex Fe(II) metal centers, allowing the metal–ligand complexes to act as mechanophores and dynamically crosslink the polymer chains. Mono- and bi-dentate ligands are observed to exhibit different degrees of bond strengths, which subsequently affect the mechanical properties of these Wolf-type-II metallopolymers. The counter ion also plays a crucial role, as it is observed that Py-Fe mechanophores with non-coordinating BPh4– counter ions (Py-FeB) exhibit better thin film ductility with lower elastic modulus, as compared to the coordinating chloro ligands (Py-FeC). Interestingly, besides mechanical robustness, the electrical charge carrier mobility can also be enhanced concurrently when incorporating Py-FeB mechanophores in PSCs. This is a unique observation among stretchable PSCs, especially that most reports to date describe a decreased mobility when the stretchability is improved. Next, it is determined that improvements to both mobility and stretchability are correlated to the solid-state molecular ordering and dynamics of coordination bonds under strain, as elucidated via techniques of grazing-incidence X-ray diffraction and X-ray absorption spectroscopy techniques, respectively. This study provides a viable approach to enhance both the mechanical and the electronic performance of polymer-based soft devices. ? 2021 Wiley-VCH GmbH |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099225257&doi=10.1002%2fadfm.202009201&partnerID=40&md5=a2d9c0ff679dfa281f53744c4c63818d https://scholars.lib.ntu.edu.tw/handle/123456789/576795 |
ISSN: | 1616301X | DOI: | 10.1002/adfm.202009201 |
顯示於: | 化學工程學系 |
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