Solvent Residue Management Crucial for High Efficiency and Long-Term Stability in Printable Mesoscopic Perovskite Solar Cells

Fresh research on business has shed light on the importance of solvent residue management in achieving high efficiency and long-term stability in printable mesoscopic perovskite solar cells. According to a new study published in APL Energy, a team of researchers from Huadian Electric Power Research Institute Co. Ltd. and other institutions has identified the challenges in fabricating carbon-based hole-transport-layer-free printable mesoscopic perovskite solar cells. The researchers have proposed several potential mitigation approaches to address the solvent removal challenge in these cells, which are promising candidates for commercialization due to their cost-effective fabrication and scalable production.

Key Takeaways:

• The fabrication of carbon-based hole-transport-layer-free printable mesoscopic perovskite solar cells faces a fundamental challenge: achieving complete perovskite infiltration and crystallization within the thick mesoscopic oxide scaffold while ensuring thorough solvent removal.
• The constrained solvent evaporation under low-temperature processing (60-80 °C) remains a critical bottleneck, impeding device performance and stability.
• The residual solvent significantly impairs charge carrier transport, thereby limiting device performance, and also compromises long-term operational stability, especially after device encapsulation and during thermal cycling between low and high temperatures.
• The research concludes that solvent residue management is a key factor for achieving high efficiency and stability in printable mesoscopic perovskite solar cells.
• Several potential mitigation approaches are proposed to address the solvent removal challenge in these cells, including device architecture optimization, solvent retention analysis, and evaluation of various strategies for solvent removal.
• The study highlights the importance of fundamental research in understanding the challenges and opportunities in developing printable mesoscopic perovskite solar cells.

Statistics:

• The solar cells in question are made using a cost-effective fabrication process.
• The research emphasizes the need for scalable production systems to achieve commercial viability.
• The study focuses on the mesoscopic perovskite solar cells, which have a thick mesoscopic oxide scaffold with a thickness of around 3 mm.
• The researchers used specialized covers with low-temperature annealing to improve perovskite filling uniformity.
• The residual solvent causes a significant reduction in device performance, which is critical for commercial applications.

Sources:

• Solvent residue management: A key factor for achieving high efficiency and stability in printable mesoscopic perovskite solar cells. APL Energy, 2025, 3(3): 030902-030902-8.
• National Natural Science Foundation of China.
• Huadian Electric Power Research Institute Co. Ltd.