期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 9, 页码 9213-9222出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b21655
关键词
black phosphorus; covalent functionalization; chemical thinning; triphenylcarbenium tetrafluorobor; TEMPO
资金
- National Science Foundation of China [21405109, 91433103, 11622437, 61674171]
- Seed Foundation of State Key Laboratory of Precision Measurement Technology and Instruments, China [Pilt1710]
- Fundamental Research Funds for the Central Universities of China
- Research Funds of Renmin University of China [16XNLQ01]
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 ([Ph3C]BF4) 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 allsolution-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.
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