Sino-Australian collaboration in developing indium-free stacked solar cells.

Professor Zhang Xiaohong and Professor Yang Xinbo from Soochow University, together with Monash University in Australia and several photovoltaic companies, have jointly developed a new type of indium-free multilayer solar cell with a solar-to-electricity conversion efficiency exceeding 30%. This breakthrough is expected to help the photovoltaic industry gradually reduce its reliance on indium, a rare and expensive metal. The research results were published online in the international academic journal "Science" on the 19th. Based on the mature production technology of "perovskite/silicon" multilayer solar cells, the team produced indium-free multilayer cells measuring 1 square centimeter and 207.9 square centimeters. These cells have been certified by the National Solar Photovoltaic Product Quality Inspection and Testing Center, with initial solar-to-electricity conversion efficiencies reaching 33.56% and 30.98% respectively. After undergoing outdoor testing for 105 days, the 207.9 square centimeter sample maintained a conversion efficiency of around 65% of its initial level.