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Strain-Tunable Opto-electronics in PdS Monolayer: the Role of Band Nesting and Carrier-Phonon Scattering
Hongfa Wang, Yancheng Gong, Subrahmanyam Pattamatta +3
Strain engineering is a powerful strategy for tuning the optoelectronic properties in two-dimensional materials, yet the underlying mechanisms governing their strain response are o…
Circular Photogalvanic Effect in Organometal Halide Perovskite CHNHPbI
Junwen Li, Paul M. Haney
We study the circular photogalvanic effect in the organometal halide perovskite solar cell absorber CHNHPbI. For crystal structures which lack inversion symmetry, the c…
MXenes as High Capacity Electrode Materials for Metal (Li, Na, K, Ca)-ion batteries
Dequan Er, Junwen Li, Michael Naguib +3
Two-dimensional (2D) materials can have an excellent capability to handle high rates of charge in ion batteries since metal ions need not diffuse in a 3D lattice structure. However…
The Equilibrium Shape of Graphene Domains on Ni(111)
Meifang Li, J. B. Hannon, R. M. Tromp +4
We have determined the equilibrium shape of graphene domains grown on Ni(111) via carbon segregation at 925°C. In situ, spatially-resolved electron diffraction measurements were us…
Bonding Charge Density and Ultimate Strength of Monolayer Transition Metal Dichalcogenides
Junwen Li, Nikhil V. Medhekar, Vivek B. Shenoy
Two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) can withstand a large deformation without fracture or inelastic relaxation, making them attractive for a…
Enhanced Catalytic Activity in Strained Chemically Exfoliated WS2 Nanosheets for Hydrogen Evolution
Damien Voiry, Hisato Yamaguchi, Junwen Li +8
The ability to efficiently evolve hydrogen via electrocatalysis at low overpotentials holds tremendous promise for clean energy. Hydrogen evolution reaction (HER) can be easily ach…