Numerical simulation of opto-electric characterization of GaAs/In0.2Ga0.8As core-shell nanowire solar cells is presented, using a finite difference time-domain (FDTD) modeling method. The results show that the absorption, external quantum efficiency (EQE) of the NW solar cell strongly depends on NW lengths and diameters, Moreover, the effect of the diameters on the current density-voltage (J-V) of the NW solar cell was calculated.
This letter presents the theoretical investigation model to calculate the defect modes, modes loss of the slab, the group velocity of the defect region, and then calculate the normalized frequency of the defect region of AlxGa1-xAs at a wavelength of 1550 nm. A fast Fourier transform method was used to find the effect of varying refractive index on the modes frequency. This change of the refractive index enhancement is attributed to the transmission.
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