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<p>To address the dual challenges of high cost and low conversion efficiency in conventional solar cells, this study proposes a high-performance GaAs thin-film solar cell structure based on a multi-structure synergistic optimization strategy. By incorporating a SiO<sub>2</sub> anti-reflection layer, Ti nanoparticles (NPs), and a periodic trapezoidal grating into the device architecture, the optical absorption characteristics in the visible spectrum are systematically investigated using the finite-difference time-domain (FDTD) method. Simulation results show that the localized surface plasmon resonance (LSPR) induced by Ti NPs and the diffraction effects generated by the trapezoidal grating synergistically enhance light-trapping capabilities, and significantly improving absorption efficiency. The optimized structure achieves an average spectral absorptance of 97.04% across the visible range. Furthermore, with an absorber layer thickness of only 500&#xa0;nm, the device exhibits excellent electrical performance, with a short-circuit current density (<i>J</i><sub><i>sc</i></sub>) of 31.31&#xa0;mA/cm<sup>2</sup>, an open-circuit voltage (<i>V</i><sub><i>oc</i></sub>) of 1.161&#xa0;V, a fill factor (FF) of 89.34%, and a power conversion efficiency (PCE) of 32.49%. The multi-structure synergistic enhancement strategy proposed in this work effectively improves the light absorption and PCE of GaAs thin-film solar cells, providing both a theoretical foundation and a practical pathway for the design and development of high-efficiency, low-cost photovoltaic devices.</p>

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Enhanced GaAs Solar Cells Based on Trapezoidal Gratings and Ti Nanoparticles

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Jun Zhu,
  • Sunlong Lin,
  • jiGao Li

摘要

To address the dual challenges of high cost and low conversion efficiency in conventional solar cells, this study proposes a high-performance GaAs thin-film solar cell structure based on a multi-structure synergistic optimization strategy. By incorporating a SiO2 anti-reflection layer, Ti nanoparticles (NPs), and a periodic trapezoidal grating into the device architecture, the optical absorption characteristics in the visible spectrum are systematically investigated using the finite-difference time-domain (FDTD) method. Simulation results show that the localized surface plasmon resonance (LSPR) induced by Ti NPs and the diffraction effects generated by the trapezoidal grating synergistically enhance light-trapping capabilities, and significantly improving absorption efficiency. The optimized structure achieves an average spectral absorptance of 97.04% across the visible range. Furthermore, with an absorber layer thickness of only 500 nm, the device exhibits excellent electrical performance, with a short-circuit current density (Jsc) of 31.31 mA/cm2, an open-circuit voltage (Voc) of 1.161 V, a fill factor (FF) of 89.34%, and a power conversion efficiency (PCE) of 32.49%. The multi-structure synergistic enhancement strategy proposed in this work effectively improves the light absorption and PCE of GaAs thin-film solar cells, providing both a theoretical foundation and a practical pathway for the design and development of high-efficiency, low-cost photovoltaic devices.