State Key Laboratory of Precision Measurement Technology and Instruments, School of Precision Instruments and Opto-electronics Engineering , Tianjin University , No. 92 Weijin Road , Tianjin 300072 , China.
Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Material & Micro-Nano Devices , Renmin University of China , Beijing 100872 , China.
ACS Appl Mater Interfaces. 2019 Mar 6;11(9):9213-9222. doi: 10.1021/acsami.8b21655. Epub 2019 Feb 20.
Layered black phosphorus (BP) has been expected to be a promising material for future electronic and optoelectronic applications since its discovery. However, the difficulty in mass fabricating layered air-stable BP severely obstructs its potential industry applications. Here, we report a new BP chemical modification method to implement all-solution-based mass production of layered air-stable BP. This method uses the combination of two electron-deficient reagents 2,2,6,6-tetramethylpiperidinyl- N-oxyl (TEMPO) and triphenylcarbenium tetrafluorobor ([PhC]BF) to accomplish thinning and/or passivation of BP in organic solvent. The field-effect transistor and photodetection devices constructed from the chemically modified BP flakes exhibit enhanced performances with environmental stability up to 4 months. A proof-of-concept BP thin-film transistor fabricated through the all-solution-based exfoliation and modification displays an air-stable and a typical p-type transistor behavior. This all-solution-based method improves the prospects of BP for industry applications.
层状黑磷（BP）自从被发现以来，一直被期望成为未来电子和光电子应用的一种有前途的材料。然而，层状空气稳定 BP 的大规模制造的困难严重阻碍了其潜在的工业应用。在这里，我们报告了一种新的 BP 化学修饰方法，以实现基于全溶液的层状空气稳定 BP 的大规模生产。该方法使用两个缺电子试剂 2,2,6,6-四甲基哌啶氮氧化物（TEMPO）和三苯基碳鎓四氟硼酸盐（[PhC]BF）的组合，在有机溶剂中完成 BP 的变薄和/或钝化。由化学修饰 BP 薄片构建的场效应晶体管和光电探测器器件表现出增强的性能，具有长达 4 个月的环境稳定性。通过全溶液剥离和修饰制造的 BP 薄膜晶体管的概念验证显示出空气稳定性和典型的 p 型晶体管行为。这种基于全溶液的方法提高了 BP 在工业应用中的前景。
