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Article Abstract
In this work, we systematically examine the electronic features and contact types of van der Waals heterostructures (vdWHs) combining single-layer boron phosphide (BP) and Janus GaSSe using first-principles calculations. Owing to the out-of-plane symmetry being broken, the BP/GaSSe vdWHs are divided into two different stacking patterns, which are BP/SGaSe and BP/SeGaS. Our results demonstrate that these stacking patterns are structurally and mechanically stable. The combination of single-layer BP and Janus GaSSe gives rise to an enhancement in the Young's modulus compared to the constituent monolayers. Furthermore, at the ground state, the BP/GaSSe vdWHs possess a type-I (straddling) band alignment, which is desired for next-generation optoelectronic applications. The interlayer separation and electric field are effectively used to tune the electronic features of the BP/GaSSe vdWH from the type-I to type-II band alignment, and from semiconductor to metal. Our findings show that the BP/GaSSe vdWH would be appropriate for next-generation multifunctional optoelectronic and photovoltaic devices.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9244894 | PMC |
| http://dx.doi.org/10.1039/d2ra02748h | DOI Listing |
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