Can edge seal materials be used in photovoltaic applications?

Here, using a Ca film deposited on a glass substrate, we demonstrate the evaluation of edge seal materials in a manner that effectively duplicates their use in a photovoltaic application and compare the results with standard methods for measuring water vapor transport.

Are epoxies a good edge seal material?

Other edge seal materials (e.g. epoxies) can have very low diffusivities, but they are hard and brittle and could easily crack or delaminate in a large module. The mechanics and logistics of measuring moisture penetration through a free-standing film of an edge seal material can be very difficult.

What is D in PV encapsulant and edge seal?

where D is the diffusivity, elapsed time, and Csat saturation. Several PV encapsulant and edge seal materials were examined using Ca-film-based test specimens. Photographs of two examples are shown in Fig. 2 to demonstrate the extreme differences among encapsulant materials.

Are photovoltaic systems sensitive to moisture?

Many types of photovoltaic (PV) technologies are sensitive to moisture [1-5]. The use of an impermeable front-sheet and back-sheet (e.g. a glass/glass laminate package) significantly reduces moisture ingress, but moisture may still diffuse in from the sides .

How are photovoltaic devices packaged?

14. ABSTRACT (Maximum 200 Words) Because of the sensitivity of some photovoltaic devices to moisture-induced corrosion, they are packaged using impermeable front- and back-sheets along with an edge seal to prevent moisture ingress.