Optimization of tin-based inverted perovskite solar cell with MoS2 interlayer by one-dimensional simulation

Abstract

Organic–inorganic perovskite solar cells (PSCs) have received extensive attention due to their excellent performances, but most of the absorber layers of such solar cells contain the toxic lead element. Replacing lead with environmentally friendly elements is one of the most essential tasks in the PSCs research field. Tin-based PSCs have emerged owing to their excellent light absorption characteristics. In this work, an Sn-based PSCs inverted structure with molybdenum disulfide (MoS2) as the interfacial layer is proposed, and the performance is studied by the numerical simulation program SCAPS-1D. The influence of the main parameters of the MoS2 layer and absorber layer and the interfacial defect state on the solar cell performance parameters is studied. This study shows that the 20 nm MoS2 layer can improve power conversion efficiency (PCE) by up to 20%. The optimized results from the structure give a PCE of 18.13%, which is comparable to popular solar cells. This work provides a new idea for developing PSCs with a combination of the inorganic hole transport layer and molybdenum disulfide in the future.