Researchers from the University of Sydney have achieved a power conversion efficiency of 30.2% for a two-terminal (2T) monolithic perovskite-silicon tandem solar cell.
The result was confirmed by the PV Performance Lab at the Commonwealth Scientific and Industrial Research Organisation (CSIRO).
The research team, headed by Professor and John Hooke Chair of Nanoscience Anita Ho-Baillie, said the breakthrough reinforces the University of Sydney’s position as a leader in perovskite–silicon tandem solar cell research.
“The achievement provides a good foundation for further area scaling of perovskite layer for improved electrical performance and stability,” Ho-Baillie told pv magazine.
“A heterojunction silicon cell was used as the bottom junction,” she went on to say. “For the top junction, one of the key challenges in scaling to large areas is achieving uniform solution-processed films. To address this, the team engineered the hole-selective layer to enable uniform and reproducible deposition of the overlying perovskite layer across a large area.
“This tenfold increase in cell area builds on the team’s previous achievement of a 30%-efficient, 1 cm² perovskite–silicon tandem solar cell, independently certified by the US National Renewable Energy Laboratory (NREL) in 2024.”
According to Ho-Baillie, the University of Sydney solar research team is now among a small number of groups worldwide to have demonstrated larger-area perovskite–silicon tandem solar cells with efficiencies of 30% or higher.
“To our knowledge, these groups include Longi, Auner, JA Solar, Trina Solar in collaboration with the National University of Singapore, a consortium comprising Soochow University, Monash University, Chint New Energy Technology, Wuxi EliTe Solar, Suzhou Maxwell, the University of Oxford, the Beijing Institute of Technology, and Suzhou Laboratory, as well as Suzhou Maxwell,” she said.
No further technical details about the new device were provided.
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