Abstract:
Three-dimensional (3D) halide perovskites as
CH3NH3PbI3 (3D-MAPI) have shown high performance in the
perovskite solar cells. However, deep defects due to lattice
disorders in the 3D halide perovskite cause to limit the
performance of the halide perovskite solar cells. We have
numerically simulated and investigated the optimum deep
defect density of the 3D-MAPI layer of the p-i-n solar cell model
with the structure of Glass/ITO(TCO)/PEDOT: PSS(HTM)/i2D-MAPI/i-3D-MAPI/i-2D-MAPI/PCBM(ETM)/Ag. Due to the
degradation of the organic components under some
environmental conditions, the Pb-based organic perovskite
solar cells need protective films. This 2D-3D-2D perovskite solar
cell has been modeled as a stable perovskite solar cell, by
inserting thin 2D-MAPI layers on both sides of the 3D-MAPI to
reduce the degradation and moisture issues. Using SCAPS-1D
solar cell simulation software, the deep defect density in the 3D
halide perovskite layer was optimized to obtain the best
performance of the cell model. Our simulation results have
indicated that the deep defect density of the 3D-MAPI layer
should not exceed 1012 cm-3 for high performance. Also, low
dark saturation current density and low Shockley-Read-Hall
(SRH) recombination current density were observed at the low
deep defect density in the 3D-MAPI layer.
