Researchers at the Chinese Academy of Sciences have achieved a world record for selenium solar cells, reaching 10.3% efficiency, surpassing the 10% threshold for the first time. This milestone was made possible through optimized charge-selective contacts, light-driven crystallization, and post-deposition annealing, resulting in stable devices with a 1.03 V open-circuit voltage. The breakthrough in selenium solar cells, known for their wider bandgap and high efficiency potential, demonstrates the success of careful optimization and strategic combinations by the research team. The device also exhibited minimal efficiency loss after 1,000 hours of testing, highlighting its promising future in the development of efficient solar energy solutions.