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<p>We study (Ag:HfO₂), designed to act simultaneously as an antireflective coating (ARC) and an intermediate reflective layer (IRL) in planar amorphous silicon (a-Si) solar cells. The optical behavior is analyzed using Scilab-based simulations with the Transfer Matrix Method (TMM), enabling precise modeling of light propagation and interference within multilayer structures. Silver incorporation modifies the HfO₂ permittivity via free-carrier effects described by the Drude model, producing epsilon-near-zero (ENZ) conditions and regions with negative permittivity. These properties enhance light trapping and absorption by minimizing front surface reflection and boosting internal reflection at the rear interface. The proposed planar approach improves optical absorption and internal quantum efficiency (IQE) without requiring complex nanostructures, offering a scalable, fabrication-compatible strategy for high-efficiency thin-film solar cells.</p>

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Mathematical approach to photonic analysis of Ag-doped HfO₂ for antireflective and intermediate reflective applications in planar a-Si solar cells

  • 期刊论文

  • 发表日期：

    2025年12月24日

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  • P. Uthayakumar,
  • K. Kathiresan,
  • M. Ismail Fathima,
  • S. K. Logesh

摘要

We study (Ag:HfO₂), designed to act simultaneously as an antireflective coating (ARC) and an intermediate reflective layer (IRL) in planar amorphous silicon (a-Si) solar cells. The optical behavior is analyzed using Scilab-based simulations with the Transfer Matrix Method (TMM), enabling precise modeling of light propagation and interference within multilayer structures. Silver incorporation modifies the HfO₂ permittivity via free-carrier effects described by the Drude model, producing epsilon-near-zero (ENZ) conditions and regions with negative permittivity. These properties enhance light trapping and absorption by minimizing front surface reflection and boosting internal reflection at the rear interface. The proposed planar approach improves optical absorption and internal quantum efficiency (IQE) without requiring complex nanostructures, offering a scalable, fabrication-compatible strategy for high-efficiency thin-film solar cells.