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<p>Silicon heterojunction (SHJ) photovoltaic cells have attracted substantial interest from the research community due to their exceptional characteristics. Compared to traditional cells, SHJ solar cells offer various advantages, such as greater flexibility in band gap adjustment, enhanced absorption capacity, simple fabrication processes, and cost-effectiveness. In this study, we examine the effect of reduced graphene oxide (rGO) layers on the efficiency of pristine zinc oxide nanorods (ZnO NRs)/3D pyramid-textured silicon (Si) structure SHJ solar cells. The ZnO NRs were synthesized through a solution-based deposition technique, and the rGO layers were applied to the ZnO NRs/3D pyramid-textured Si structure via electrophoretic deposition (EPD). The proposed configuration (rGO-coated ZnO NRs/3D pyramid-textured Si structure solar cell) is designed to enhance light absorption and minimize the recombination rate of photo-induced charge carriers. The evaluation was performed using various techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Raman spectroscopy, and reflectance and photoluminescence spectroscopy. FESEM results indicated that the rGO layers did not disrupt the ZnO NRs/3D pyramid-textured Si substrate during the EPD process. The initial efficiency of the pristine ZnO NRs/3D pyramid-textured Si heterojunction solar cell was 1.6%, which improved to 2% after coating with rGO layers.</p>

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Improved performance of ZnO nanorods/3D pyramid-textured silicon heterojunction solar cells via electrophoretic deposition of reduced graphene oxide

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Parisa Fallahazad,
  • Mohamad Javad Eshraghi

摘要

Silicon heterojunction (SHJ) photovoltaic cells have attracted substantial interest from the research community due to their exceptional characteristics. Compared to traditional cells, SHJ solar cells offer various advantages, such as greater flexibility in band gap adjustment, enhanced absorption capacity, simple fabrication processes, and cost-effectiveness. In this study, we examine the effect of reduced graphene oxide (rGO) layers on the efficiency of pristine zinc oxide nanorods (ZnO NRs)/3D pyramid-textured silicon (Si) structure SHJ solar cells. The ZnO NRs were synthesized through a solution-based deposition technique, and the rGO layers were applied to the ZnO NRs/3D pyramid-textured Si structure via electrophoretic deposition (EPD). The proposed configuration (rGO-coated ZnO NRs/3D pyramid-textured Si structure solar cell) is designed to enhance light absorption and minimize the recombination rate of photo-induced charge carriers. The evaluation was performed using various techniques, including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Raman spectroscopy, and reflectance and photoluminescence spectroscopy. FESEM results indicated that the rGO layers did not disrupt the ZnO NRs/3D pyramid-textured Si substrate during the EPD process. The initial efficiency of the pristine ZnO NRs/3D pyramid-textured Si heterojunction solar cell was 1.6%, which improved to 2% after coating with rGO layers.