Thiophene‐Rich 2D sp2‐Carbon‐Linked Semiconducting Conjugated Polymers
yamei liu a, xinliang feng a
a Technische Universität Dresden (TUD), 01069 Dresde, Alemania, Dresde, Germany
Poster, yamei liu, 027
Publication date: 11th July 2022

Vinylene/olefin-linked two-dimensional covalent organic frameworks (v-2D-COFs) synthesized via reticular chemistry are featured with high chemical stability, excellent in-plane conjugated networks, and modulated optoelectronic properties. In particular, V-2D-COFs provide a platform to develop advanced semiconducting materials with high charge carrier mobilities which is however rarely reported so far. Herein, we demonstrate the synthesis of the first thiophene-rich V-2D-COF (named as V-2D-COF-T1) from a novel 4,8-di-2-thienylbenzo[1,2-b:4,5-b’]dithiophene based building block (FTTC) which is covalently connected by a bithiophene-based linker (ThDAN). Interestingly, the bithiophene-linked V-2D-COF exhibit a narrow energy band gap of ~1.13 eV, which is much narrower than those of corresponding linear thiophane-rich polymer (LTP, 1.48 eV) and biphenyl-linked V-2D-COF-T2 (1.73 eV). Moreover, ultrafast terahertz photoconductivity measurements indicate that the V-2D-COF-T1 has a high charge-carrier mobility up to ~21.39 cm2 V−1 s−1. This work provides the insights to design and synthesis of thiophene-rich 2D semiconducting polymers with high charge-carrier mobilities.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info