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<p>In this study, an ITO/PTAA/CsPbIxBr<sub>3−x</sub>/C<sub>60</sub>/SnO<sub>2</sub>/Au structure was investigated to enhance the power conversion efficiency (PCE) of perovskite solar cells using the Silvaco Atlas simulator. The device featured CsPbIxBr<sub>3−x</sub> as the absorber, PTAA as the hole transport layer (HTL), and a C<sub>60</sub>/SnO<sub>2</sub> bilayer as the electron transport layer (ETL). We optimized the thickness of each layer and analyzed the effect of absorber defect density on performance. The optimal configuration included a 100&#xa0;nm PTAA layer, 25&#xa0;nm each for C<sub>60</sub> and SnO<sub>2</sub>, and a 250&#xa0;nm perovskite layer with a defect density of ~ 10<sup>14</sup>&#xa0;cm⁻<sup>3</sup>. Under these conditions, the maximum PCE reached 21.80%. Simulations further showed that increasing the doping concentrations of the C<sub>60</sub> and SnO<sub>2</sub> layers, individually or together, significantly enhances device efficiency, achieving PCE above 25% in photovoltaic applications. These results provide key guidance for optimizing perovskite solar cells with inorganic charge transport layers.</p> Graphical abstract <p></p>

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Numerical optimization of CsPbIxBr3−x-based perovskite photovoltaic solar cells performance using PTAA and C60/SnO2 charge transport layers

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Mohamed Rahmani,
  • Imad Eddine Tinedert,
  • Achour Saadoune,
  • Imad Youcef,
  • Madjda Bacha

摘要

In this study, an ITO/PTAA/CsPbIxBr3−x/C60/SnO2/Au structure was investigated to enhance the power conversion efficiency (PCE) of perovskite solar cells using the Silvaco Atlas simulator. The device featured CsPbIxBr3−x as the absorber, PTAA as the hole transport layer (HTL), and a C60/SnO2 bilayer as the electron transport layer (ETL). We optimized the thickness of each layer and analyzed the effect of absorber defect density on performance. The optimal configuration included a 100 nm PTAA layer, 25 nm each for C60 and SnO2, and a 250 nm perovskite layer with a defect density of ~ 1014 cm⁻3. Under these conditions, the maximum PCE reached 21.80%. Simulations further showed that increasing the doping concentrations of the C60 and SnO2 layers, individually or together, significantly enhances device efficiency, achieving PCE above 25% in photovoltaic applications. These results provide key guidance for optimizing perovskite solar cells with inorganic charge transport layers.

Graphical abstract