Jang Soo-Young, Kim In-Bok, Kang Minji, Fei Zuping, Jung Eunhwan, McCarthy-Ward Thomas, Shaw Jessica, Lim Dae-Hee, Kim Yeon-Ju, Mathur Sanjay, Heeney Martin, Kim Dong-Yu
Research Institute for Solar and Sustainable Energies (RISE) Gwangju Institute of Science and Technology (GIST) 123 Cheomdangwagi-ro, Buk-gu Gwangju 61002 Republic of Korea.
Department of Chemistry and Centre for Plastic Electronics Imperial College London Exhibition Rd London SW7 2AZ UK.
Adv Sci (Weinh). 2019 Apr 26;6(13):1900245. doi: 10.1002/advs.201900245. eCollection 2019 Jul 3.
The synthesis of a diseleno[3,2-:2',3'-]selenophene (DSS) composed of three fused selenophenes is reported and it is used as a building block for the preparation of a high hole mobility conjugated polymer (PDSSTV). The polymer demonstrates strong intermolecular interactions even in solution, despite steric repulsion between the large Se atom in DSS and adjacent (C)-H atoms which leads to a partially twisted confirmation PDSSTV. Nevertheless, 2D grazing incidence X-ray diffraction (2D-GIXD) analysis reveals that the polymer tends to align in a highly ordered edge-on orientation after thermal annealing. The polymer demonstrates promising performance in a field-effect transistor device with saturated hole mobility up to 2 cm V s obtained under relatively low gate voltages of -30 V. The ultilization of a Se-containing fused aromatic system, therefore, appears to be a promising avenue for the development of high-performance conjugated polymers.
报道了由三个稠合硒吩组成的二硒并[3,2-:2',3'-]硒吩（DSS）的合成，并将其用作制备高空穴迁移率共轭聚合物（PDSSTV）的结构单元。尽管DSS中的大尺寸硒原子与相邻的（C）-H原子之间存在空间排斥，导致PDSSTV呈现部分扭曲的构象，但该聚合物即使在溶液中也表现出强烈的分子间相互作用。然而，二维掠入射X射线衍射（2D-GIXD）分析表明，热退火后该聚合物倾向于以高度有序的边缘取向排列。该聚合物在场效应晶体管器件中表现出良好的性能，在-30 V的相对低栅极电压下，饱和空穴迁移率高达2 cm² V⁻¹ s⁻¹。因此，含硒稠合芳香体系的应用似乎是开发高性能共轭聚合物的一条有前景的途径。
