Scientists in the US took a closer look at the mechanisms causing perovskites to degrade under light and raised temperatures. By testing perovskite cells with various additives and other recipe tweaks, the group was able to identify pathways to improving long-term stability.
The mechanisms behind light-elevated temperature-induced degradation are still not fully understood, but it is known to cause significant performance losses for modules in the field. Scientists in China are investigating the causes of the phenomenon, and are currently focused on the surface of the materials and the interfaces between the silicon and passivation layers.
Asier Ukar, director of the Spanish unit of German technical advisory PI Berlin, tells pv magazine about his experiences of conducting quality control inspections in Chinese factories during the global pandemic.
Australian researchers have unveiled hydrogenation technology to reduce light and elevated temperature-induced degradation in Czochralski silicon PERC solar cells. The developers say the process can minimize degradation without sacrificing performance in cells and modules.
A team of researchers from Manchester University claims to have identified the dominant process causing light-induced degradation in silicon solar cells. The process, termed “trap-assisted auger recombination”, arises from a defect in the bulk of the silicon material which lies dormant until exposed to sunlight.
What is your recommendation for investors when buying PERC modules? Can LeTID loss be completely recovered in the field? Can one be sure that there is no LID and LeTID in n-type cells? Presenters, Andrea Viaro, head of technical service Europe, JinkoSolar, Stefan Roest , CTO, Eternal Sun & Spire Solar and Paul Grunow, technology consultant, board of the PI Photovoltaic Institute Berlin AG answer these and other questions from a recent pv magazine webinar.
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