High-efficiency and stable FA0.75MA0.25SnI3perovskite solar cells with large-size crystal grains prepared by doping with multifunctional chloride salt

Tin-based perovskite solar cells are expected to replace lead-based perovskite solar cells to achieve environmentally friendly devices. Currently, a significant challenge lies in low filling factor and short-circuit current density, leading to an overall lower efficiency of these cells. In this context, we conducted a comprehensive comparative study on the deposition of these three inorganic small-molecule materials (CsBr, CsCl, CsI) on tin-based perovskite layers. The results showed that depositing these three inorganic small-molecule materials (CsBr, CsCl, CsI) on tin-based perovskite layers can improve the topography of the thin film and display an increased grain size. Simultaneously, the presence of the passivation layer facilitates preferred crystal orientation and enhanced charge carrier transport capabilities. Furthermore, devices with passivation layers exhibit reduced series resistance and increased shunt resistance, leading to a higher filling factor, a higher short-circuit current density, and a reduced leakage current in the passivated devices. This results in an elevated overall conversion efficiency of the devices. Notably, among the three halide materials employed for passivation, CsI demonstrates the most effective passivation, with the champion device achieving an efficiency of 6.0%. This study contributes valuable insights into the passivation strategies for tin-based perovskite solar cells.

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Issues, Challenges, and Future Perspectives of Perovskites for Energy Conversion Applications

Diouf,

Muley,

Pode

2023

Energies

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Perovskite solar cells are an emerging technology that exploits the self-assembly and highly tunable bandgap properties of perovskite materials. Because of their low manufacturing cost, thin films of perovskites have attracted enormous interest and witnessed great progress. The power conversion efficiency of these devices has improved from 3.8% to 25.8%, which is a significant step forward. The formulation of innovative materials with the proper replacement of lead in perovskites is essential to reduce lead toxicity. Here, we examine the difficulties encountered in the commercialization of perovskite devices, such as material and structural stability, device stability under high temperature and humidity conditions, lifetime, and manufacturing cost. This review addresses issues such as device engineering, performance stability against the harsh environment, cost-effectiveness, recombination, optical, and resistance losses, large-area solar cell module issues, material cost analysis, module cost reduction strategy, and environmental concerns, which are important for the widespread acceptance of perovskite-based solar devices. The applications and market growth prospects of perovskite cells are also studied. In summary, we believe there is a great opportunity to research high-performance, long-lived perovskites and cells for energy applications.

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High-efficiency and stable FA_0.75MA_0.25SnI₃perovskite solar cells with large-size crystal grains prepared by doping with multifunctional chloride salt

Abstract: The C6H2(NH2)4·4HCl was first doped into FA0.75MA0.25SnI3 to suppress the production of Sn4+ and promote the formation of large-sized grains in perovskite films. The introduction of C6H2(NH2)4·4HCl significantly improved the performance of PSCs.

Cited by 3 publications

References 58 publications

Improved perovskite crystallization by antisolvent engineering in tin-perovskite photovoltaics

Improved perovskite crystallization by antisolvent engineering in tin-perovskite photovoltaics

Comparative study of cesium halide (CsX, X = I, Cl, Br) modifications on defect passivation in tin-based perovskite solar cells

Issues, Challenges, and Future Perspectives of Perovskites for Energy Conversion Applications

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