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<p>We have studied the enhanced absorption and photocurrent density in silicon solar cells composed of plasmonic nano-rod arrays. The designed metal nano-rod arrays are used as localized surface plasmon back reflectors, improving the photocurrent’s efficiency. A double layer of silicon dioxide (SiO<sub>2</sub>) and silicon nitride (Si<sub>3</sub>N<sub>4</sub>) is used as antireflection to achieve high photocurrent. The simulation of the proposed structure is performed using the finite difference time domain (FDTD) approach, and the parameters are optimized to achieve high efficiency. The results are analyzed over a wavelength range of 400–1100&#xa0;nm. In the proposed solar cell design, the incorporated titanium (Ti) nano-structure provides better short circuit current density results of 39.54&#xa0;mA/cm<sup>2</sup>, and the average absorption is more than 90% for the visible to near-infrared (IR) range. The distribution of the electric field and the current density within the active medium for different values the Ti nano-rods structures. The characteristics of the proposed solar cell structure are plotted under AM1.5G solar radiation at normal incidence. We have proposed the optimized structural parameters of the considered solar cells, which provide the required guidance and also give further opportunities to design highly efficient silicon cells coupled with nano-rods array.</p>

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Effect of plasmonic nanorods to enhance the absorption and photocurrent density in silicon solar cells

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • Sanket Kumar,
  • Raj Kumar,
  • Bipin K. Singh,
  • Praveen C. Pandey

摘要

We have studied the enhanced absorption and photocurrent density in silicon solar cells composed of plasmonic nano-rod arrays. The designed metal nano-rod arrays are used as localized surface plasmon back reflectors, improving the photocurrent’s efficiency. A double layer of silicon dioxide (SiO2) and silicon nitride (Si3N4) is used as antireflection to achieve high photocurrent. The simulation of the proposed structure is performed using the finite difference time domain (FDTD) approach, and the parameters are optimized to achieve high efficiency. The results are analyzed over a wavelength range of 400–1100 nm. In the proposed solar cell design, the incorporated titanium (Ti) nano-structure provides better short circuit current density results of 39.54 mA/cm2, and the average absorption is more than 90% for the visible to near-infrared (IR) range. The distribution of the electric field and the current density within the active medium for different values the Ti nano-rods structures. The characteristics of the proposed solar cell structure are plotted under AM1.5G solar radiation at normal incidence. We have proposed the optimized structural parameters of the considered solar cells, which provide the required guidance and also give further opportunities to design highly efficient silicon cells coupled with nano-rods array.