研究目的
To propose an effective optical structure in perovskite solar cells (PSCs) by texturing the rear-side perovskite layer with a rectangular grating to promote the optical response in the near-infrared region.
研究成果
The proposed rear-side rectangular grating design in perovskite solar cells (PSCs) significantly enhances optical absorption in the near-infrared region, leading to an improved photocurrent density. The design shows high tolerance to varied incident angles and provides a feasible scheme to boost the perovskite optical absorption in the near-infrared region.
研究不足
The study is based on numerical simulations, and practical implementation may face challenges in fabricating the proposed rear grating structure with precise dimensions. Additionally, the study focuses on the optical aspects and does not address potential electrical or material challenges in real-world applications.
1：Experimental Design and Method Selection:
The study employs the finite element method (FEM) to perform optical simulation, solving Maxwell’s equations to obtain spatial electromagnetic information. The simulated structure includes glass substrate, FTO, TiO2, perovskite, Spiro, and Au back contact.
2：Sample Selection and Data Sources:
The study considers wavelength ranging from 300 to 800 nm, consistent with the bandgap of perovskite. The data of wavelength-dependent optical constant for all materials were extracted from references.
3：List of Experimental Equipment and Materials:
The simulation involves materials like glass, FTO, TiO2, perovskite (CH3NH3PbX3, X = Cl, Br, I), Spiro, and Au.
4：Experimental Procedures and Operational Workflow:
The study optimizes the rear grating size to find the best device structure, investigating the effect of pitch, height (h), and width ratio (ff) on the optical response.
5：Data Analysis Methods:
The photocurrent density (Jph) is calculated to quantitatively evaluate the optical absorption ability of perovskite layer.
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