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<p>The present study explores the compatibility of p-type CuO/rGO nanocomposite back-contact layer for CdTe solar cells in superstrate geometry. Monoclinic CuO nanoparticles (38.74&#xa0;nm avg. size) and defect-engineered rGO (<i>I</i>(D)/<i>I</i>(G) = 1.38) were synthesized via hydrothermal and modified Hummers’ methods, respectively. Three different CuO/rGO nanocomposites were developed by varying the CuS:rGO mass ratios (1:1, 0.6:1, and 0.3:1), and this is confirmed using the XRD analysis and is supported by the micro-Raman analysis. The oxidation states, chemical, and electronic properties of the nanocomposite with an equal CuO: rGO ratio were analyzed using the XPS and UPS analysis, respectively. All samples had a direct allowed bandgap in the range 1.1.2 to 1.8&#xa0;eV. The prepared nanoparticles and nanocomposites were spin-coated on top of the deposited FTO/CdS/CdTe; finally, silver was used as the back metal contact. From the <i>J</i>–<i>V</i> characterization, the cell with rGO back contact produced a power conversion efficiency of 8.85% with open circuit voltage (<i>V</i><sub>oc</sub>), short circuit current density (<i>J</i><sub>sc</sub>), and fill factor (FF) values of 0.73&#xa0;V, 21.38&#xa0;mA/cm<sup>2</sup>, and 57.15%, respectively. The results indicate that the prepared CuO/rGO nanocomposites did not perform as intended due to the formation of a potential barrier of approximately 0.55&#xa0;eV at the CdTe//CuO/rGO interface.</p>

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Development of CuO/rGO nanocomposite back-contact layer for CdTe solar cells

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • V. Vishnu Narayanan,
  • S. R. Vishnu Vijay,
  • C. P. Aiswarya,
  • Meghna Pavithran,
  • K. S. Rajni,
  • Udai P. Singh

摘要

The present study explores the compatibility of p-type CuO/rGO nanocomposite back-contact layer for CdTe solar cells in superstrate geometry. Monoclinic CuO nanoparticles (38.74 nm avg. size) and defect-engineered rGO (I(D)/I(G) = 1.38) were synthesized via hydrothermal and modified Hummers’ methods, respectively. Three different CuO/rGO nanocomposites were developed by varying the CuS:rGO mass ratios (1:1, 0.6:1, and 0.3:1), and this is confirmed using the XRD analysis and is supported by the micro-Raman analysis. The oxidation states, chemical, and electronic properties of the nanocomposite with an equal CuO: rGO ratio were analyzed using the XPS and UPS analysis, respectively. All samples had a direct allowed bandgap in the range 1.1.2 to 1.8 eV. The prepared nanoparticles and nanocomposites were spin-coated on top of the deposited FTO/CdS/CdTe; finally, silver was used as the back metal contact. From the J–V characterization, the cell with rGO back contact produced a power conversion efficiency of 8.85% with open circuit voltage (Voc), short circuit current density (Jsc), and fill factor (FF) values of 0.73 V, 21.38 mA/cm2, and 57.15%, respectively. The results indicate that the prepared CuO/rGO nanocomposites did not perform as intended due to the formation of a potential barrier of approximately 0.55 eV at the CdTe//CuO/rGO interface.