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Vol.5 , No. 2, Publication Date: May 10, 2018, Page: 33-38
| [1] | Vitalii Borblik, Department of Electrical & Galvanomagnetic Properties of Semiconductors, Institute of Semiconductor Physics, Kiev, Ukraine. |
Electrostatics of radial core-shell heterostructure p-n junctions is considered theoretically in two combinations: narrow-bandgap core/wide-bandgap shell and vice versa. Because of cylindrical symmetry of the structure, depletion width of the core increases with decrease of the interface radius but depletion width of the shell, on the contrary, decreases. Thereby the relative contribution from different materials into performance characteristics of devices, which use a heterostructure p-n junction, changes substantially. Sequence of the different layers is of importance as well. In both combinations, values of depletion widths in the heterostructure p-n junction prove to be intermediate between those for homostructure p-n junctions made of the constituent materials at the same doping levels. Analogous situation takes place for barrier capacitance of the heterostructure p-n junction.
Keywords
Core-shell Nanowire, Heterostructure, p-n Junction, Depletion Width, Barrier Capacitance
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