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China headquartered DAS Solar has partnered with University of New South Wales to advance tunnel oxide passivated back contact (TBC) solar cell technology. The joint research was published in the journal Progress in Photovoltaics and co-authored by Professor Martin Green and DAS Solar CTO Dengyuan Song. The study identified pathways to improve conversion efficiency and lower manufacturing costs for fully passivated contact TBC solar cells. Researchers analyzed passivation mechanisms and carrier transport dynamics using advanced three-dimensional photovoltaic simulations. The study also proposed a busbar-free electrode pad design to reduce silver paste consumption while improving efficiency. DAS Solar stated its DBC 3.0 Plus platform has increased cell efficiency from 25.5% to 27.77% over five years using TOPCon-based architecture. The company said the findings could support commercialization of future DBC 4.0 solar cell technology.
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