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<p>To effectively enhance the light absorption capability of GaAs thin-film solar cells and improve their photovoltaic conversion efficiency (PCE), this paper proposes a cell design that combines a periodic surface grating structure with the localized surface plasmon resonance (LSPR) effect. The light absorption capability of the cell is primarily limited by the thickness of the thin film and the surface light reflection effects. By utilizing the diffraction effect of the surface grating, the propagation path of light within the thin film is extended, and the scattering distribution of light is optimized, which effectively reduces the light reflection loss on the cell surface. In addition, this paper designs a four-layer metal Ti nanofilm inside the cell to excite the LSPR effect, enhancing the local field strength and light absorption capacity. This cell structure not only improves light absorption efficiency but also enhances the current output capability of the solar cell. Under the combined effects of the grating structure and LSPR, the designed GaAs thin-film solar cell demonstrates excellent light absorption performance, particularly in the visible and near-infrared wavelength range of 380–1200 nm. The average absorption rate of the cell reaches 97.2%, with the absorption rate in the visible light range exceeding 94%. Further experiments show that the optimized cell achieves a PCE of 33.95%. This represents a significant improvement compared to traditional design approaches, providing new insights and technological pathways for the design and application of high-efficiency GaAs solar cells in the future.</p>

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Research of Enhancing the Light Absorption and Strengthen GaAs Thin Film Solar Cells with Metallic Ti Material Based on Grating Structure and Surface Plasmon Resonance Effect

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Tangming Li,
  • Jun Zhu

摘要

To effectively enhance the light absorption capability of GaAs thin-film solar cells and improve their photovoltaic conversion efficiency (PCE), this paper proposes a cell design that combines a periodic surface grating structure with the localized surface plasmon resonance (LSPR) effect. The light absorption capability of the cell is primarily limited by the thickness of the thin film and the surface light reflection effects. By utilizing the diffraction effect of the surface grating, the propagation path of light within the thin film is extended, and the scattering distribution of light is optimized, which effectively reduces the light reflection loss on the cell surface. In addition, this paper designs a four-layer metal Ti nanofilm inside the cell to excite the LSPR effect, enhancing the local field strength and light absorption capacity. This cell structure not only improves light absorption efficiency but also enhances the current output capability of the solar cell. Under the combined effects of the grating structure and LSPR, the designed GaAs thin-film solar cell demonstrates excellent light absorption performance, particularly in the visible and near-infrared wavelength range of 380–1200 nm. The average absorption rate of the cell reaches 97.2%, with the absorption rate in the visible light range exceeding 94%. Further experiments show that the optimized cell achieves a PCE of 33.95%. This represents a significant improvement compared to traditional design approaches, providing new insights and technological pathways for the design and application of high-efficiency GaAs solar cells in the future.