Improvement in 4-terminal perovskite/silicon heterojunction tandem solar cells’ performance with an index matching layer of silicon nitride

Perovskite/silicon tandem solar cells are considered a low-cost solution to overcome the silicon solar cells’ performance restriction. Light management is a potential approach in the improvement of their efficiency. In this work, we simulate and optimize 4-terminal perovskite/silicon heterojunction tandem solar cells with efficient light management using a silicon nitride layer as an index matching layer instead of the intermediate air medium layer between their top and bottom cells. Also, we demonstrate the effect of the index matching layer on their performance. With this approach, their efficiency enhances from 29.52% to 34.23%.