Abstract
We have conducted a series of accelerated exposure test (AET) studies for various crystalline-Si (c-Si) and amorphous-Si (a-Si) cell samples that were encapsulated with different superstrates, pottants, and substrates. Nonuniform browning patterns of ethylene vinyl acetate (EVA) pottants were observed for glass/EVA/glass-encapsulated c-Si cell samples under solar simulator exposures at elevatedtemperatures. The polymer/polymer-configured laminates with Tedlar or Tefzel did not discolor because of photobleaching reactions, but yellowed with polyester or nylon top films. Delamination was observed for the polyester/EVA layers on a-Si minimodules and for a polyolefin-based thermoplastic pottant at high temperatures. For all tested c-Si cell samples, irregular changes in thecurrent-voltage parameters were observed that could not be accounted for simply by the transmittance changes of the superstrate/pottant layers. Silicone-type adhesives used under UV-transmitting polymer top films were observed to cause greater cell current/efficiency loss than EVA or polyethylene pottants.
| Original language | American English |
|---|---|
| Number of pages | 8 |
| State | Published - 1998 |
| Event | National Center for Photovolatics Program Review Meeting - Denver, Colorado Duration: 8 Sep 1998 → 11 Sep 1998 |
Conference
| Conference | National Center for Photovolatics Program Review Meeting |
|---|---|
| City | Denver, Colorado |
| Period | 8/09/98 → 11/09/98 |
NREL Publication Number
- NREL/CP-520-25361