Simulation and Optimization of Bifacial Solar Cells with a Hetero-Junction MicroCrystalline Intrinsic thin layer

In this paper, the TCO/a-Si:H(n)/c-Si:H(i)/c-Si(p)/c-Si:H(i)/BSF/TCO/Ag Bifacial HIT (Heterojunction with intrinsic thin-layer) solar cells was analyzed and designed by AFORS-HET Software. We consider the emitter and BSF layers thickness is constant, then the influences of wafer and intrinsic layer thickness, Densities of interface defects (Dit), and using three different types BSF layer and compare the output from these three types of structure with structure without the BSF layer, Solar cell efficiency is studied And the best available mode for optimum cell is selected. It is noteworthy that according to the simulation results, use a layer of intrinsic microcrystalline layer of a-Si: H (n) / c-Si (p) and c-Si (p) / a-Si: H (p ) Density of states and combined carriers reduce, Increase the efficiency of silicon solar cells is the numerical value of 28%.