Scholarlink

<p>A multi-junction tandem configuration perovskite solar cell (PSC) with wide-bandgap and narrow-bandgap materials can overcome the limitations of a single-junction solar cell, particularly in terms of the parameters responsible for the highest energy losses, and thus can play a vital role in designing high-performance PSCs. The present work reveals an entirely lead-free multi-junction all-perovskite tandem solar cell using a wide-bandgap material, Cs<sub>2</sub>AgBi<sub>0.75</sub>Sb<sub>0.25</sub>Br<sub>6</sub>, with a bandgap of 1.8&#xa0;eV, serving as the absorber layer in the top cell, and a narrow-bandgap material, CH<sub>3</sub>NH<sub>3</sub>SnI<sub>3</sub>, with a bandgap of 1.3&#xa0;eV, serving as the absorber layer in the bottom cell. The proposed structure is capable of capturing a greater portion of the solar spectrum. The top cell and bottom cell underwent optimization using numerous approaches, including concurrent variations in the width of the active layer with total defect density and adjustments in interface defect density in relation to the parameters of the photovoltaic cell. These optimizations resulted in remarkable power conversion efficiency (PCE) of 17.81% and 27.74% for the top cell and bottom cell, respectively. Different electron and hole transport layer materials were tested to achieve an optimal configuration of the perovskite/perovskite tandem photovoltaic cell using a filtered spectrum method with current-matching analysis. The resulting entirely lead-free all-perovskite tandem solar cell demonstrated enhanced open-circuit voltage (<i>V</i><sub>OC</sub>) of 2.24&#xa0;V, short-circuit current density (<i>J</i><sub>SC</sub>) of 15.22&#xa0;mA/cm<sup>2</sup>, fill factor (FF) of 84%, and PCE of 28.69%. These findings offer substantial potential for affordable and clean energy, advancing the development of PSCs in the future.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical Analysis of a Lead-Free Tandem Solar Cell Using SCAPS-1D Device Simulation with Improved Efficiency of 28.69%

  • 期刊论文

  • 发表日期：

    2025年8月5日

查看全文
  • Sunita Kumari Sah,
  • Pooja Lohia,
  • R. K. Chauhan,
  • D. K. Dwivedi

摘要

A multi-junction tandem configuration perovskite solar cell (PSC) with wide-bandgap and narrow-bandgap materials can overcome the limitations of a single-junction solar cell, particularly in terms of the parameters responsible for the highest energy losses, and thus can play a vital role in designing high-performance PSCs. The present work reveals an entirely lead-free multi-junction all-perovskite tandem solar cell using a wide-bandgap material, Cs2AgBi0.75Sb0.25Br6, with a bandgap of 1.8 eV, serving as the absorber layer in the top cell, and a narrow-bandgap material, CH3NH3SnI3, with a bandgap of 1.3 eV, serving as the absorber layer in the bottom cell. The proposed structure is capable of capturing a greater portion of the solar spectrum. The top cell and bottom cell underwent optimization using numerous approaches, including concurrent variations in the width of the active layer with total defect density and adjustments in interface defect density in relation to the parameters of the photovoltaic cell. These optimizations resulted in remarkable power conversion efficiency (PCE) of 17.81% and 27.74% for the top cell and bottom cell, respectively. Different electron and hole transport layer materials were tested to achieve an optimal configuration of the perovskite/perovskite tandem photovoltaic cell using a filtered spectrum method with current-matching analysis. The resulting entirely lead-free all-perovskite tandem solar cell demonstrated enhanced open-circuit voltage (VOC) of 2.24 V, short-circuit current density (JSC) of 15.22 mA/cm2, fill factor (FF) of 84%, and PCE of 28.69%. These findings offer substantial potential for affordable and clean energy, advancing the development of PSCs in the future.

Graphical Abstract