Investigation of the effect of defect density on an environmentally friendly solar cell with an optimal choice of HTL

Abstract

One of the promising directions in solar energy is the use of perovskite-based solar cells. The competitiveness of perovskite solar cells with silicon solar cells is growing every year, but to further improve the efficiency of perovskite-based solar cells, it is worth paying attention to the HTL type. The density of interfacial defects in a solar cell based on CH3NH3SNI3 plays an important role in increasing efficiency. In order to increase the performance of a solar cell based on CH3NH3SNI3, work was done to select the most suitable interfacial defect. In this work, the SCAPS-1D program was used to create a model of a solar cell. The SCAPS-1D program evaluates the effect of the density of interfacial defects on a solar cell based on CH3NH3SNI3, which ranged from 1010 cm-3 to 1017 cm-3. TiO2/СH3NH3SnI3/ Cu2O is proposed as the optimal structure of an environmentally friendly solar cell, which provides optimal performance and better resistance to defects. As a result of the study, the selected optimal option is the structure of an environmentally friendly TiO2/СH3NH3SnI3/Cu2O solar cell with PCE = 27.95%, FF 84.05%, VOC 1.02 V and JSC 32.60 mA/cm2, which provides high efficiency and better resistance to defects.

Key words: solar energy, environmentally friendly solar cell, SCAPS-1D, CH3NH3SNI3, modeling, HTL.