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Ultrafast Electrochemical Expansion of Black Phosphorus toward High-Yield Synthesis of Few-Layer Phosphorene
journal contribution
posted on 2018-04-03, 00:00 authored by Jing Li, Cheng Chen, Shule Liu, Junpeng Lu, Wei Peng Goh, Hanyan Fang, Zhizhan Qiu, Bingbing Tian, Zhongxin Chen, Chuanhao Yao, Wei Liu, Huan Yan, Ying Yu, Dan Wang, Yewu Wang, Ming Lin, Chenliang Su, Jiong LuTo
bridge the gap between laboratory research and commercial applications,
it is vital to develop scalable methods to produce large quantities
of high-quality and solution-processable few-layer phosphorene (FLBP).
Here, we report an ultrafast cathodic expansion (in minutes) of bulk
black phosphorus in the nonaqueous electrolyte of tetraalkylammonium
salts that allows for the high-yield (>80%) synthesis of nonoxidative
few-layer BP flakes with high crystallinity in ambient conditions.
Our detailed mechanistic studies reveal that cathodic intercalation
and subsequent decomposition of solvated cations result in the ultrafast
expansion of BP toward the high-yield production of FLBP. The FLBPs
thus obtained show negligible structural deterioration, excellent
electronic properties, great solution processability, and high air
stability, which allows us to prepare stable BP inks (2 mg/mL) in
low-boiling point solvents for large-area inkjet printing and fabrication
of optoelectronic devices.
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Keywords
nonaqueous electrolytecathodic intercalationpoint solventsUltrafast Electrochemical Expansionair stabilityambient conditionsHigh-Yield Synthesisultrafast expansioninkjet printingsolution processabilityscalable methodssolution-processable few-layer phosphorenesolvated cations resultnonoxidative few-layer BP flakeslaboratory researchFew-Layer PhosphoreneFLBPBlack Phosphorustetraalkylammonium saltsultrafast cathodic expansionoptoelectronic devices