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LeTID

The struggle against LeTID continues

Researchers in Australia have conducted extensive research on all possible causes behind the light-elevated temperature-induced degradation (LeTID) in solar panels and presented a few mitigation strategies put in place by manufacturers to reduce its effects.

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Understanding perovskite degradation

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.

Scratching the surface of LeTID

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.

Canadian Solar joins the 500 W-plus panel club

The Chinese-Canadian company has unveiled a range of high-power modules which are set to go into mass production by early next year. The series includes a commercial and industrial rooftop-dedicated product offering a reported 405 W.

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Solar module quality control measures in an age of Covid-19

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.

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Preventing LID in a 23.83% efficient Longi PERC cell

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.

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The weekend read: Is PERC still bankable?

Light-induced initial degradation in PERC modules is currently a subject of intense discussion, but tests at PI Berlin have shown that the problem is solvable. Founder and CEO Paul Grunow explains the effects, the approach, and the results.

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UK scientists observe LID in action

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.

Webinar Q & A: How can investors mitigate the risk of LID and LeTID?

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.

LID and LeTID: Q&A with JinkoSolar

Our next pv magazine webinar is approaching and has already attracted interest. Is it possible to control LID and LeTID and, if so, how? Here, Andrea Viaro from webinar partner Jinko Solar gives an insight into the manufacturer’s experience.

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