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<p>Perovskite solar cells (PSCs) have rapidly advanced as leading contenders in 3rd generation photovoltaic (PV) technologies, driven by their exceptional optoelectronic properties and impressive efficiency gains over the past decade. Despite these advancements, conventional single-absorber PSCs face intrinsic limitations in light absorption range and charge carrier extraction, which restrict their overall performance ceiling. To address these challenges, this study introduces a novel all-inorganic dual-absorber device architecture that strategically combines CsSnI₃ and CsPbI₃ perovskite layers. This configuration harnesses their complementary bandgaps and distinct charge transport characteristics, enabling enhanced photon harvesting and improved carrier dynamics. The proposed device uses PC₆₀BM and Cu₂O as efficient ETL and HTL, selected for their ideal energy alignment and stability. The enhanced performance stems from the synergy between the dual absorbers and optimized charge-selective layers, enabling efficient charge separation, reduced recombination, and balanced carrier transport. The findings demonstrate the viability of all-inorganic, multi-absorber PSCs not only for achieving high power conversion efficiency (PCE) of 21.71%, and stability but also for aligning with scalable, low-cost fabrication routes, offering a compelling strategy for future commercial photovoltaic technologies.</p>

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Optimized dual absorber architecture for enhanced efficiency and stability in all-inorganic perovskite solar cells

  • 期刊论文

  • 发表日期：

    2025年8月31日

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  • Priyanka Gupta,
  • Sudakar Singh Chauhan,
  • Kaushal Kumar Nigam,
  • Dharmendra Kumar,
  • Jaya Madan,
  • Ruchi Devlal

摘要

Perovskite solar cells (PSCs) have rapidly advanced as leading contenders in 3rd generation photovoltaic (PV) technologies, driven by their exceptional optoelectronic properties and impressive efficiency gains over the past decade. Despite these advancements, conventional single-absorber PSCs face intrinsic limitations in light absorption range and charge carrier extraction, which restrict their overall performance ceiling. To address these challenges, this study introduces a novel all-inorganic dual-absorber device architecture that strategically combines CsSnI₃ and CsPbI₃ perovskite layers. This configuration harnesses their complementary bandgaps and distinct charge transport characteristics, enabling enhanced photon harvesting and improved carrier dynamics. The proposed device uses PC₆₀BM and Cu₂O as efficient ETL and HTL, selected for their ideal energy alignment and stability. The enhanced performance stems from the synergy between the dual absorbers and optimized charge-selective layers, enabling efficient charge separation, reduced recombination, and balanced carrier transport. The findings demonstrate the viability of all-inorganic, multi-absorber PSCs not only for achieving high power conversion efficiency (PCE) of 21.71%, and stability but also for aligning with scalable, low-cost fabrication routes, offering a compelling strategy for future commercial photovoltaic technologies.