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LID

Shedding light on amorphous silicon

Scientists in Europe took a very close look at the thin amorphous silicon layers used in heterojunction and tandem solar cells, building a full picture of the material’s structure at the nanoscale. Their findings could help scientists solve the long-standing mystery of light induced degradation.

Heating up the heterojunction-LID discussion

Scientists led by the University of New South Wales have looked into the long-term degradation of silicon-heterojunction. Their findings suggest that illumination at high temperatures could actually improve cell efficiency, but also risks activating multiple light-induced degradation mechanisms if not carefully controlled.

The weekend read: Gallium in the fight against LID

From the acquisition of IP to commercialization, the PV industry has witnessed a rapid rise of gallium-doped silicon. Researchers are testing the resulting cells’ stability while industry has begun the manufacturing phase. All this leads to a key question: Will gallium doped silicon solar modules will be the next big thing?

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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JA Solar granted intellectual property rights for Ga-doping technology

The Chinese company has announced it has acquired intellectual property rights pertaining to various applications of gallium-doped silicon wafers in solar cell applications from Japanese company Shin-Etsu Chemical.

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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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Trina Solar begins mass production of 425 W bifacial glass-glass module

The Chinese PV manufacturer uses TOPCon half cells for the modules. The additional rear side yield is estimated by Trina at 5-30%.

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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.

Battle of the module reliability rankings

While PV module makers are attempting to get the best possible scores for their products on 3rd party tests, 3rd-party testing providers are also offering competing products to rank products. We look at what’s similar and what’s different in the tests.

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