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Low-damaged p-type doping of MoS2 using direct nitrogen plasma modulated by toroidal-magnetic-field.

08:00 EDT 12th September 2019 | BioPortfolio

Summary of "Low-damaged p-type doping of MoS2 using direct nitrogen plasma modulated by toroidal-magnetic-field."

Low damaged doping of two dimensional (2D) materials proves to be a significant obstacle in realizing fundamental devices such as p-n junction diodes and transistors due to its atom layer thickness. In this work, the defect formation energy and p-type conduction behaviour of nitrogen plasma doping are investigated by first-principle calculation. Low damaged substitutional p-type doping in MoS2 using low energy nitrogen plasma composed of N+ and N2+ is achieved by a novel toroidal magnetic field (TMF). The TMF helps to raise the concentration of N2+ ions at low RF power condition. The electrical characteristics of double-layer MoS2 field-effect transistors (FETs) clearly show an efficient p-type doping behavior. Atomic Force Microscope is applied to verify the slight damage in MoS2. X-ray photoelectron spectroscopy, photoluminescence and Raman spectroscopy confirm the effective p-type doping characteristic with weak damage. These findings provide a low damage technology for efficient carrier modulation of MoS2 and other homogeneous TMDC materials, which overcomes barriers in developing 2D electronic and optoelectronic devices.

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Name: Nanotechnology
ISSN: 1361-6528
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