Ślęczkowski Piotr, Xiao Yiming, Wu Jeong Weon, Adachi Chihaya, Vargas Lydia Sosa, Kreher David, Heinrich Benoît, Ribierre Jean-Charles, Mathevet Fabrice
Department of Physics, CNRS-Ewha International Research Center, Ewha Womans University, Seoul 120-750, Republic of Korea.
International Centre for Research on Innovative Bio-based Materials (ICRI-BioM) - International Research Agenda, Lodz University of Technology, Zeromskiego 116, Lodz 90-924, Poland.
J Phys Chem C Nanomater Interfaces. 2024 Dec 12;128(51):21826-21835. doi: 10.1021/acs.jpcc.4c06222. eCollection 2024 Dec 26.
We have examined the structural and electron transport properties of a swallow-tailed ,'-bis(1-heptyloctyl)-perylene-3,4:9,10-bis(dicarboximide) () in thin films. A comprehensive analysis of material with the use of X-ray scattering methods evidenced the appearance of a new soft-crystalline mesophase that was induced by thermal processing of the swallow-tail PDI derivative. By combining electrical measurements with grazing-incidence wide-angle X-ray scattering (GIWAXS), we show that these morphological changes of thin films boost their charge transport in the organic field-effect transistor (OFET) configuration. The systematic device engineering of OFETs, including device architecture, thermal history, and preparation method of the active layer, resulted in a significant improvement in the electron field-effect mobility and the related performance parameters. In particular, the results demonstrate a strong improvement in the charge transport of films in their soft-crystalline phase, which originates from the -substitution by swallow-tails. In addition, our study demonstrates that the melt-processing route, a solvent-free and vacuum-free method for the fabrication of organic thin films, represents an efficient strategy for the fabrication of high-performance air-stable -type OFETs.
我们研究了燕尾状的1,7-双（1-庚基辛基）-苝-3,4:9,10-双（二羧酸二酰亚胺）（ ）薄膜的结构和电子传输特性。使用X射线散射方法对该材料进行的综合分析表明，燕尾状苝二酰亚胺衍生物的热处理诱导了一种新的软结晶中间相的出现。通过将电学测量与掠入射广角X射线散射（GIWAXS）相结合，我们表明薄膜的这些形态变化提高了其在有机场效应晶体管（OFET）配置中的电荷传输。对OFET进行系统的器件工程设计，包括器件结构、热历史和有源层的制备方法，显著改善了电子场效应迁移率和相关性能参数。特别是，结果表明处于软结晶相的 薄膜的电荷传输有了显著改善，这源于燕尾状的 取代。此外，我们的研究表明，熔体加工路线，一种用于制造有机薄膜的无溶剂和无真空方法，是制造高性能空气稳定型 型OFET的有效策略。
