All‐Inorganic Tin‐Containing Perovskite Solar Cells: An Emerging Eco‐Friendly Photovoltaic Technology

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Abstract
All‐inorganic tin (Sn)‐containing perovskites have emerged as highly promising photovoltaic materials for single‐junction and tandem perovskite solar cells (PSCs), owing to their reduced toxicity, optimal narrow bandgap, and superior thermal stability. Since their initial exploration in 2012, significant advancements have been achieved, with the highest efficiencies of single‐junction and tandem devices now surpassing 17% and 22%, respectively. Nevertheless, the intrinsic challenges associated with the oxidation susceptibility of Sn2+ and the uncontrolled crystallization dynamics impede their further development. Addressing these issues necessitates a comprehensive and systematic understanding of the degradation mechanisms inherent to all‐inorganic Sn‐containing perovskites, as well as the development of effective mitigation strategies. This review provides a detailed overview of the research progress in all‐inorganic Sn‐containing PSCs, with a particular focus on the basic properties and degradation pathways of both pristine Sn and mixed Sn‐Pb perovskites. Furthermore, various strategies to improve the efficiency and stability of Sn‐containing PSCs are thoroughly discussed. Finally, the existing challenges and perspectives are provided for further improving the photovoltaic performance of eco‐friendly PSCs.
Funding Information
  • National Natural Science Foundation of China (22025505 22220102002)
  • Shanghai Jiao Tong University (WH220449011)

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