Correlating Charge Transport Properties of Conjugated Polymers in Solution Aggregates and Thin‐Film Aggregates
| Autor: | Zi-Di Yu, Hai I. Wang, Ze-Fan Yao, Lucia Di Virgilio, Jie-Yu Wang, Zi-Yuan Wang, Yang-Yang Zhou, Jian Pei, Xiao-Ye Wang, Lin Zou, Qi-Yi Li, Xin-Yi Wang, Yang Lu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Angewandte Chemie. 133:20646-20651 |
| ISSN: | 1521-3757 0044-8249 |
| Popis: | The role of solution aggregates on the charge transport process of conjugated polymers in electronic devices has gained increasing attention; however, the correlation of the charge carrier mobilities between the solution aggregates and the solid-state films remains elusive. Herein, three polymers, FBDOPV-2T, FBDOPV-2F2T, and FBDOPV-4F2T, are designed and synthesized with distinct aggregation behavior in solution. By combining contact-free ultrafast terahertz (THz) spectroscopy and field-effect transistor measurements, we track the charge carrier mobility of the aggregates of these polymers from the solution to the thin-film state. Remarkably, the mobility of these three polymers is found to follow nearly the same trend (FBDOPV-2T>FBDOPV-2F2T≫FBDOPV-4F2T) in both solutions and thin-film states. The quantitative mobility correlation indicates that the charge transport properties of solution aggregates play a critical role in determining the thin-film charge transport properties and final device performance. Our results highlight the importance of investigating and controlling solution aggregation structures towards efficient organic electronic devices. |
| Databáze: | OpenAIRE |
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