Improve efficiency of Perovskite Based Solar Cell by photon recycling

photon recycling

Abstract

Thin-film planar heterojunction perovskite solar cells have emerged as promising candidates for next-generation photovoltaic technologies due to their low fabrication cost and high power conversion efficiency (PCE). Among the various materials explored, perovskite (CH₃NH₃PbI₃) based solar cell considering n-i-p structure, stands out as a highly efficient absorber owing to their favorable optoelectronic properties, including high crystallinity, superior carrier mobility, and long diffusion lengths. Despite these advantages, the highest reported PCE for such cells remains at 24.3% (as of 2024). In this work, we present a novel thin-film perovskite solar cell design incorporating hybrid material interfaces and a one-dimensional photonic crystal at the device's rear side to enhance photon recycling and reduce carrier recombination. Numerical simulations are performed using the Rigorous Coupled Wave Analysis (RCWA) method via the SYNOPSYS RSoft CAD tool, with layer thicknesses optimized using the MOST scanning and optimization module. The proposed architecture achieves a PCE of 25.9% with a fill factor of 86.3% under AM 1.5 solar conditions and a total device thickness of approximately 2.5 µm. These results highlight the potential of the proposed design to surpass the 20% efficiency benchmark and offer a competitive alternative to conventional crystalline silicon photovoltaics.