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Realization of In‐Plane p–n Junctions with Continuous Lattice of a Homogeneous Material
Author(s) -
Huang Xiaochun,
Liu Bing,
Guan Jiaqi,
Miao Guangyao,
Lin Zijian,
An Qichang,
Zhu Xuetao,
Wang Weihua,
Guo Jiandong
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201802065
Subject(s) - materials science , monolayer , semiconductor , graphene , epitaxy , lattice (music) , band bending , condensed matter physics , fabrication , homogeneous , optoelectronics , nanotechnology , physics , medicine , alternative medicine , layer (electronics) , pathology , acoustics , thermodynamics
Two‐dimensional (2D) in‐plane p–n junctions with a continuous interface have great potential in next‐generation devices. To date, the general fabrication strategies rely on lateral epitaxial growth of p‐ and n‐type 2D semiconductors. An in‐plane p–n junction is fabricated with homogeneous monolayer Te at the step edge on graphene/6H‐SiC(0001). Scanning tunneling spectroscopy reveals that Te on the terrace of trilayer graphene is p‐type, and it is n‐type on monolayer graphene. Atomic‐resolution images demonstrate the continuous lattice of the junction, and mappings of the electronic states visualize the type‐II band bending across the space‐charge region of 6.2 nm with a build‐in field of 4 × 10 5 V cm −1 . The reported strategy can be extended to other 2D semiconductors on patternable substrates for designed fabrication of in‐plane junctions.