双极扩散
材料科学
石墨烯
堆积
光电子学
场效应晶体管
载流子
有机场效应晶体管
有机电子学
有机半导体
共价有机骨架
异质结
晶体管
工作职能
纳米技术
图层(电子)
电压
化学
电子
有机化学
电气工程
物理
工程类
量子力学
多孔性
复合材料
作者
Bing Sun,Chenhui Zhu,Yi Liu,Cheng Wang,Wan Li,Dong Wang
标识
DOI:10.1021/acs.chemmater.7b00800
摘要
Periodically eclipsed π-stacking columns in two-dimensional covalent organic frameworks (2D COFs) could function as direct channel paths for charge carrier transport. Incorporating a well-defined 2D COF into organic electronic devices, however, is still a challenge. Herein, we have reported the solvothermal synthesis of a COFTFPy-PPDA film on single-layer graphene (SLG), which was constructed via covalent imine-type linkage by employing 1,3,6,8-tetrakis(p- formylphenyl)pyrene (TFPy) and p-phenylenediamine (PPDA) as building blocks. A vertical field-effect transistor (VFET) based on the heterostructure of COFTFPy-PPDA film and SLG shows ambipolar charge carrier behavior under lower modulating voltages. Work-function-tunable contact between SLG and COFTFPy-PPDA film and suitable injection barriers of charge carriers lead to the ambipolar transport with high current density on/off ratio (>105) and high on-current density (>4.1 A cm–2). Interfacing 2D COF with graphene for VFET could shed light on the promising application prospect of 2D COFs in organic electronics and optoelectronics.
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