Analysis of the causes of debonding of photovoltaic panel glass

Preliminary experiments using 532 nm pulses showed that the laser debonding method could remove the glass-EVA layer from sections of decommissioned commercial PV panels, even when the top glass layer was densely cracked.
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About Analysis of the causes of debonding of photovoltaic panel glass

About Analysis of the causes of debonding of photovoltaic panel glass

Preliminary experiments using 532 nm pulses showed that the laser debonding method could remove the glass-EVA layer from sections of decommissioned commercial PV panels, even when the top glass layer was densely cracked.

Preliminary experiments using 532 nm pulses showed that the laser debonding method could remove the glass-EVA layer from sections of decommissioned commercial PV panels, even when the top glass layer was densely cracked.

Adhesion and Debonding Kinetics in PV Devices and Modules. Support: DoE support through the Bay Area PV Consortium, Predicts CPV program through SunShot, and the CAMP-KAUST center.

For the glass/EVA interface, a good agreement of the degradation products obtained by field exposure of glass/backsheet PV modules and local ageing testing under hot-humid conditions was confirmed allowing for potential test time acceleration factors up to 100.

Glass/EVA laminates exhibited a significantly lower delamination resistance under hot-humid conditions, while double glass laminates with POE encapsulation performed remarkably. Clear indications for hydrolysis-induced deacetylation within the fracture process zone at the glass/EVA interface were deduced within an overall testing time of just 3 .

Our results demonstrate that debonding of the EVA-glass layer from the underlying Si cell can be accomplished in a selective and nondestructive manner using pulsed laser light, providing a new technique that can be applied to PV recycling.

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