UNSW & Jolywood test EVA-backed TOPCon modules for durability

The University of New South Wales (UNSW), supported by China-based Jolywood, has conducted a study on the durability of EVA-based glass-backsheet TOPCon modules. According to UNSW, modules were tested using standard Ag/Al paste and low-Al-content paste with laser-assisted firing under damp-heat conditions. The results showed that standard paste had lower stability, while both variants were affected by glass-frit failure in acid-rich moisture. The research has stated that rear-side metal contacts with tellurium compounds were also prone to environmental degradation. As per the research team, while EVA with polymer backsheets reduces cost and weight, reliability remains a concern under harsh environments. The study concluded that further investigation is required before this structure can be widely applied in commercial TOPCon module production.