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<p>Amidst the advancements in nanotechnology, this paper explores the enhancement of solar cell (SC) efficiencies through the innovative use of nanowire (NW) architectures composed of III-V semiconductor materials such as Gallium Arsenide (GaAs). These NWs are renowned for their superior optical and electrical properties, including high absorption coefficients and enhanced charge carrier mobility, which collectively improve power conversion efficiencies (PCE). Additionally, their structural design significantly reduces material usage, offering a sustainable alternative to traditional planar SCs. This research primarily investigates the integration of unique anti-reflective conical nanostructures and aluminum (Al) metal layers within GaAs NW-SCs to enhance their performance. Utilizing the finite difference time domain (FDTD) method and charge solver module in the Lumerical software package, we examined various conical configurations at the apex and assessed the impact of an Al back reflector at the base. Our results revealed that optimizing the effect of three different anti-reflective structures, specifically the truncated cone, simple cone, and parabolic cone coupled with adjustments in the Al layer’s thickness, maximizes light absorption due to Surface Plasmon Resonance (SPR). Among the nanostructures, the truncated cone structure was selected for its superior performance of overall efficiency enhancement. The role of Al in extending the operational spectrum by shifting plasmonic resonances toward the ultraviolet enables it to outperform other metals in enhancing light trapping and reducing surface reflection losses. The strategic placement of these nanostructures within the cell architecture is crucial for tapping into significant efficiency gains through advanced light management techniques. The enhancements led to a 20.36% increase in the short-circuit current density (Jsc) and a 21.62% uplift in overall efficiency, marking significant progress in the field. Hence, our study suggests that the proposed structure by integrating nanostructured designs and the plasmonic properties of Al provides a robust pathway toward developing high-efficiency photovoltaic devices.</p>

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Advanced Light Management in GaAs Nanowire Solar Cells through Integrated Plasmonic Back-Reflector and Anti-Reflective Conical Nanostructures

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • Prerana Roy,
  • Manisha Rautela,
  • Jitendra Kumar

摘要

Amidst the advancements in nanotechnology, this paper explores the enhancement of solar cell (SC) efficiencies through the innovative use of nanowire (NW) architectures composed of III-V semiconductor materials such as Gallium Arsenide (GaAs). These NWs are renowned for their superior optical and electrical properties, including high absorption coefficients and enhanced charge carrier mobility, which collectively improve power conversion efficiencies (PCE). Additionally, their structural design significantly reduces material usage, offering a sustainable alternative to traditional planar SCs. This research primarily investigates the integration of unique anti-reflective conical nanostructures and aluminum (Al) metal layers within GaAs NW-SCs to enhance their performance. Utilizing the finite difference time domain (FDTD) method and charge solver module in the Lumerical software package, we examined various conical configurations at the apex and assessed the impact of an Al back reflector at the base. Our results revealed that optimizing the effect of three different anti-reflective structures, specifically the truncated cone, simple cone, and parabolic cone coupled with adjustments in the Al layer’s thickness, maximizes light absorption due to Surface Plasmon Resonance (SPR). Among the nanostructures, the truncated cone structure was selected for its superior performance of overall efficiency enhancement. The role of Al in extending the operational spectrum by shifting plasmonic resonances toward the ultraviolet enables it to outperform other metals in enhancing light trapping and reducing surface reflection losses. The strategic placement of these nanostructures within the cell architecture is crucial for tapping into significant efficiency gains through advanced light management techniques. The enhancements led to a 20.36% increase in the short-circuit current density (Jsc) and a 21.62% uplift in overall efficiency, marking significant progress in the field. Hence, our study suggests that the proposed structure by integrating nanostructured designs and the plasmonic properties of Al provides a robust pathway toward developing high-efficiency photovoltaic devices.