Light-trapping enhancement in perovskite solar cells using a cost-effective mold-replicated textured polymer substrate

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Chinese explanation / 中文解读

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Original abstract

Abstract Light trapping is an effective strategy for enhancing optical absorption in perovskite solar cells (PSCs), particularly in the long-wavelength region where absorption is limited. In this study, we propose a cost-effective light-trapping architecture based on a mold-replicated textured cyclo-olefin polymer substrate. Finite-difference time-domain simulations reveal a significant enhancement in optical confinement, with a spatially averaged electric-field intensity enhancement factor of 1.82 at 700 nm for an optimized texture diameter of 3.5 µm. Devices incorporating the textured substrate exhibit enhanced short-circuit current density and external quantum efficiency over a broad spectral range compared with planar reference devices. The enhancement is more pronounced at longer wavelengths and shows good agreement with simulation results. This approach enables scalable, lithography-free fabrication while maintaining effective optical management, providing a practical pathway toward low-cost and high-performance perovskite photovoltaics.

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