In a significant advancement for solar technology, researchers have unveiled a groundbreaking method for fabricating highly efficient formamidinium lead triiodide (FAPbI3) perovskite solar cells (PSCs) under challenging high-humidity conditions. This innovative approach, spearheaded by Bo-Tau Liu from the Department of Chemical and Materials Engineering at National Yunlin University of Science and Technology, could revolutionize the solar energy landscape, particularly for construction projects in humid environments.
Traditionally, the production of FAPbI3 PSCs has been hindered by the material’s susceptibility to moisture, which accelerates the transition from its photo-active α-phase to the less effective δ-phase. Liu’s team has made strides in overcoming this obstacle by employing a one-step solution deposition method at a relative humidity of 70%, a feat previously thought impossible without auxiliary equipment or processes. “By incorporating a highly volatile solvent and methacrylic acid into the perovskite layer, we were able to maintain structural integrity and enhance performance even in humid conditions,” Liu explained.
The dual-functional passivation strategy not only mitigates the formation of pinholes in the perovskite layer but also significantly reduces deep-level defects. This results in a low trap-state density and high charge recombination resistance, leading to longer charge lifetimes. Liu noted, “Our method not only improves efficiency but also enhances the long-term stability of the solar cells, which is crucial for commercial viability.”
This breakthrough holds considerable implications for the construction sector, where the integration of solar technology into building materials is increasingly sought after. The ability to produce efficient solar cells in humid conditions opens up new possibilities for solar installations in regions typically deemed unsuitable for such technologies. As sustainability becomes a priority in construction, this research paves the way for more resilient and efficient solar energy solutions.
The findings, published in ‘Applied Surface Science Advances,’ demonstrate that with the right techniques, even the most challenging environmental conditions can be harnessed to produce cutting-edge solar technology. This could lead to a future where solar cells are seamlessly integrated into buildings, providing renewable energy solutions that are both efficient and adaptable to various climates.
For more information about Bo-Tau Liu’s work, you can visit lead_author_affiliation.