Researchers at the University of Toledo are making strides in solar cell technology specifically designed for outer space. A team of physicists at the university’s Wright Center for Photovoltaics Innovation and Commercialization is addressing the significant challenges that solar cells face in the harsh conditions of space. These challenges include extreme temperatures and high levels of radiation, which negatively impact the efficiency and lifespan of solar cells compared to their Earth-based counterparts.
Advancements in Antimony-Based Solar Cells
The research is part of a large-scale initiative supported by the Air Force Research Laboratory. A recent breakthrough involves the use of antimony compounds as light-absorbing semiconductors. The findings were published in the journal Solar RRL, which featured the team’s work on its front cover.
According to Alisha Adhikari, a doctoral student in physics and co-leader of the research team, “Antimony chalcogenide solar cells exhibit superior radiation robustness compared to the conventional technologies we’re deploying in space.” Despite their potential, Adhikari noted that these solar cells must significantly improve their efficiency to become viable alternatives for future space missions.
Future Research Directions
The team, led by Dr. Randall Ellingson, a professor in the Department of Physics and Astronomy and the Wright Center Endowed Chair, is planning further studies to enhance energy harvesting capabilities in the challenging environment of space. Collaborating with Adhikari are postdoctoral researcher Dr. Vijay Karade, doctoral student Scott Lambright, and faculty members Dr. Yanfa Yan and Dr. Zhaoning Song.
The growing interest in antimony compounds as a key material for solar cells reflects their potential to improve energy generation in space missions. The team’s latest research contributes to a broader understanding of how new materials can be utilized to enhance solar technology in extreme conditions.
This innovative research underscores the importance of developing more resilient solar technologies as space exploration continues to advance. In the coming years, these advancements could play a crucial role in the sustainability of long-term missions beyond Earth.
The study titled “Assessing Proton Radiation Hardness of Antimony Chalcogenide Solar Cells” was published in Solar RRL in 2025, highlighting the promising characteristics of this emerging technology.
