Numerical Study of Efficiency Enhancement of Nanostructured Silicon-Perovskite Tandem Thin Film Solar Cells.

Solar cells are one of the most promising sustainable, renewable and clean energy sources. Reflection loss is one of the major concerns in thin film solar cells technology. Nano-structuring of the top surface is one of the best methods to reduce the solar cell's reflection losses. Tandem technology enhances the absorption of sunlight in a broad spectrum. Nanostructured Si-Perovskite tandem thin film solar cells significantly improve the absorption efficiency of solar cells. Perovskite materials play an important role in solar cell technology due to their low cost and highly efficient materials. The major advantages of using perovskite (ABX<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>) structure-type materials are the flexibility and tunability of the bandgap by changing the element components of the materials. In this paper, we study a silicon-perovskite heterostructure for tandem thin film solar cells where we incorporate the square and triangular lattice nanostructured pattern with parabolic morphology to enhance the optical absorption efficiency of solar cells.