“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 15113 |
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| Abstract: | |||||
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New two dimensional structures containing phosphorus and germanium atoms are introduced for
nanoelectronic applications. Under various bias voltages, electronic transport in the systems has been
studied with the non-equilibrium Green's function formalism. I-V characteristics have been extracted.
The density of states (DOS) and transmission spectra, T(E,Vbias), have been investigated and it was shown
that charge transport occurs when the bias voltage reaches about 1 V. The negative differential
resistance (NDR) appears in zigzag phosphorene nanoribbons (zPNRs) while it is completely suppressed
after replacing edge phosphorus atoms with germanium ones. The calculated molecular projected selfconsistent
Hamiltonian (MPSH) shows that the spatial distribution of orbital levels has been affected by
the electrodes. The studied structures have a band-gap of about 0.7 eV which absorbs light in the visible
range and thus these structures could be interesting contenders for solar cells applications.
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