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Semiconducting Black Phosphorus: Synthesis, Transport Properties and Electronic Applications
Han Liu, Yuchen Du, Yexin Deng +1
Phosphorus is one of the most abundant elements preserved in earth, constructing with a fraction of ~0.1% of the earth crust. In general, phosphorus has several allotropes. The two…
Contact Research Strategy for Emerging Molybdenum Disulfide and Other Two-Dimensional Field-effect Transistors
Yuchen Du, Lingming Yang, Han Liu +1
Layered two-dimensional (2D) semiconducting transition metal dichalcogenides (TMD) have been widely isolated, synthesized, and characterized recently. Numerous 2D materials are ide…
Chloride Molecular Doping Technique on 2D Materials: WS2 and MoS2
Lingming Yang, Kausik Majumdar, Han Liu +8
Low-resistivity metal-semiconductor (M-S) contact is one of the urgent challenges in the research of 2D transition metal dichalcogenides (TMDs). Here, we report a chloride molecula…
Temporal and Thermal Stability of Al2O3-passivated Phosphorene MOSFETs
Xi Luo, Yaghoob Rahbarihagh, James C. M. Hwang +3
This letter evaluates temporal and thermal stability of a state-of-the-art few-layer phosphorene MOSFET with Al2O3 surface passivation and Ti/Au top gate. As fabricated, the phosph…
Two-Dimensional TaSe2 Metallic Crystals: Spin-Orbit Scattering Length and Breakdown Current Density
Adam T. Neal, Yuchen Du, Han Liu +1
We have determined the spin-orbit scattering length of two-dimensional layered 2H-TaSe2 metallic crystals by detailed characterization of the weak anti-localization phenomena in th…
Device Perspective for Black Phosphorus Field-Effect Transistors: Contact Resistance, Ambipolar and Scaling
Yuchen Du, Han Liu, Yexin Deng +1
Although monolayer black phosphorus (BP) or phosphorene has been successfully exfoliated and its optical properties have been explored, most of electrical performance of the device…
High-Performance MoS2 Field-Effect Transistors Enabled by Chloride Doping: Record Low Contact Resistance (0.5 kohm*um) and Record High Drain Current (460 uA/um)
Lingming Yang, Kausik Majumdar, Yuchen Du +8
In this paper, we report a novel chemical doping technique to reduce the contact resistance (Rc) of transition metal dichalcogenides (TMDs) - eliminating two major roadblocks (name…
The Effect of Dielectric Capping on Few-Layer Phosphorene Transistors: Tuning the Schottky Barrier Heights
Han Liu, Adam T. Neal, Mengwei Si +2
Phosphorene is a unique single elemental semiconductor with two-dimensional layered structures. In this letter, we study the transistor behavior on mechanically exfoliated few-laye…
MoS2 Field-effect Transistors with Graphene/Metal Heterocontacts
Yuchen Du, Lingming Yang, Jingyun Zhang +4
For the first time, n-type few-layer MoS2 field-effect transistors with graphene/Ti as the hetero-contacts have been fabricated, showing more than 160 mA/mm drain current at 1 μm g…