Researchers in China have made a significant breakthrough in the development of solar power technology. A team of researchers from the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences has created more efficient and stable all-perovskite tandem solar cells (TSCs). These solar cells work by optimizing solar spectrum utilization, absorbing the sun’s energy on two levels. A wide-bandgap (WBG) top cell captures high-energy photons, while a narrow bandgap (NBG) bottom cell captures lower-energy wavelengths.
The previous limitation of all-perovskite TSCs was the corrosion of nickel oxide (NiOx) in the WBG top cells caused by phosphoric acid anchors. However, the researchers, led by Professor Ge Ziyi, found that replacing the phosphoric acid with less-acidic boric acid solved the problem. This new formula created a more stable bond, resulting in a significant improvement in the power conversion efficiency (PCE) of the solar cells.
The new solar cells achieved an impressive 28.5% PCE, a significant leap compared to the average home solar power system. To put this into perspective, the current most efficient home solar options for 2025 have an efficiency range of 22.6% to 24.1%. The new solar cells also demonstrated long-term stability, maintaining 90% of their initial efficiency after 500 hours of one sun illumination.
This breakthrough could be a major stepping stone for the development of high-performance TSCs in the future. The potential for more efficient and stable solar cells could lead to wider adoption of solar power and reduced costs for homeowners. With the ability to save up to $10,000 on installation, going solar is an attractive option for those looking to reduce their energy costs and carbon footprint.
In addition to the breakthrough in solar cell technology, there are also resources available to help homeowners go solar. EnergySage offers a free tool to compare quotes from vetted local installers, making it easier to find the best option for your needs. Installing solar panels can bring energy costs down to near $0, while also reducing pollution and contributing to a more sustainable future. With the right tools and resources, homeowners can make the transition to solar power and start enjoying the benefits of clean energy.