Overview
- Researchers at Kyushu University and Johannes Gutenberg University Mainz reported a ~130% quantum yield using singlet fission in a solution experiment published in the Journal of the American Chemical Society.
- Singlet fission splits one high-energy photon into two excitons, a route that could beat the ~33% efficiency ceiling for single-junction solar cells known as the Shockley–Queisser limit.
- Separately, a Chinese Academy of Sciences team reported an all-perovskite tandem cell at 29.76% efficiency with an independently certified 29.22% in a study published in Joule.
- The perovskite device kept over 90% of its starting performance after 700 hours of operation, and a 1 cm² version reached 28.87% efficiency in lab tests.
- The new results add to a recent run of records that includes a certified ~30.02% perovskite–silicon triple-junction cell and JinkoSolar’s 26.66% TOPCon cell, yet long-term durability and scale-up remain the key hurdles.