Toward air-stable multilayer phosphorene thin-films and transistors
By Joon-Seok Kim, Yingnan Liu, Weinan Zhu, Seohee Kim, Di Wu, L. Tao, Ananth Dodabalapur, K. Lai, Deji Akinwande. Scientific Reports, 2014
388 citations recorded by the source corpus.
Few-layer black phosphorus (BP), also known as phosphorene, is poised to be the most attractive graphene analogue owing to its high mobility approaching that of graphene and its thickness-tunable band gap that can be as large as that of molybdenum disulfide. In essence, phosphorene represents the much sought after high-mobility, large direct band gap two-dimensional layered crystal that is ideal for optoelectronics and flexible devices. However, its instability in air is of paramount concern for practical applications. Here, we demonstrate air-stable BP devices with dielectric and hydrophobic encapsulation. Microscopy, spectroscopy and transport techniques were employed to elucidate the aging mechanism, which can initiate from the BP surface for bare samples, or edges for samples with thin dielectric coating, highlighting the ineffectiveness of conventional scaled dielectrics. Our months-long studies indicate that a double layer capping of Al2O3 and hydrophobic fluoropolymer affords BP devices and transistors with indefinite air-stability for the first time, overcoming a critical material challenge for applied research and development.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/714a22702086a302afbfc0e1d9b8c2a887dda128
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Citations in the corpus
- Chemical and structural stability of 2D layered materials (2019, background): “Except MoS2 mentioned above, other encapsulation materials can also be employed to effectively passivate the surface of some unstable 2D materials, such as AlOx deposited by atomic layer deposition (ALD) [81], transferred graphene [169], transferred BN or BN produced by physical vapor deposition (PV”
- The rising star of 2D black phosphorus beyond graphene: synthesis, properties and electronic applications (2017, background): “On the other hand, when black phosphorus absorbs H2O, its volume expands (over 200%) and surface becomes rougher followed by dissipating from the surface through chemical changes [143, 145].”