并五苯
材料科学
亚辛
聚苯乙烯
聚合物
相(物质)
聚合物混合物
表面能
有机电子学
表面光洁度
化学工程
化学物理
纳米技术
晶体管
复合材料
薄膜晶体管
共聚物
有机化学
分子
电压
化学
物理
图层(电子)
量子力学
工程类
作者
Jung Hun Lee,Jaegeun Lyu,Minsong Kim,Hyungju Ahn,Soohwan Lim,Ho Won Jang,Hyun‐Jong Chung,June Hyuk Lee,Jaseung Koo,Wi Hyoung Lee
标识
DOI:10.1002/adfm.202215221
摘要
Abstract Interfacial structure is critical for optimizing the electrical properties of organic field‐effect transistors. In this study, the interfacial structures of 6,13‐bis(triisopropylsilylethynyl)pentacene (TIPS‐pentacene)/polymer blends are nondestructively determined by the complementary neutron and X‐ray reflectivity. The TIPS‐pentacene/deuterated poly(methylmethacrylate) (d‐PMMA) blends exhibit a vertically phase‐separated structure with a molecularly sharp interface (interfacial roughness ≈5 Å), whereas the TIPS‐pentacene/d‐polystyrene (d‐PS) blend intermix near the interface. Ultrahigh molecular weight d‐PMMA leads to the formation of surface‐segregated hexagonal spherulites of TIPS‐pentacene owing to the thermodynamic factors (e.g., surface/interface energy, polarity, and viscosity) of the blending materials. The well‐developed hexagonal spherulites of TIPS‐pentacene on molecularly sharp d‐PMMA interface result in higher field‐effect mobility as compared to the dendritic crystals from d‐PS blends because of the higher perfectness, coverage, and interfacial roughness of the TIPS‐pentacene crystals. The approach used in this study facilitates the understanding of the charge transport mechanism at the phase‐separated interfaces in soluble acene/polymer blends.
科研通智能强力驱动
Strongly Powered by AbleSci AI