Calcium based test method for evaluation of photovoltaic edge-seal materials
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Author
Contributions
- Dameron, Arrelaine - Contributor
- Reese, Matthew - Contributor
- National Renewable Energy Laboratory (U.S.) - Contributor
- United States. Department of Energy - Contributor
- United States. Department of Energy. Office of Scientific and Technical Information - Contributor
and 1 more
- Photovoltaic Module Reliability Workshop (2011 : Golden, Colo.) - Contributor
Publication
2011 - National Renewable Energy Laboratory, Golden, Colo., Colorado
Language
English
Word Count
5,250 words, Guess
Page Count
21 pages
Physical Format
Electronic resource
Identifiers
- OCLC Control Number727186022
- Open LibraryOL43926273M
Description
Because of the sensitivity of some photovoltaic devices to moisture-induced corrosion, they are packaged using impermeable front- and back-sheets with an edge seal to prevent moisture ingress. Evaluation of edge seal materials can be difficult because of the low permeation rates involved and/or non-Fickian behavior. 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. We demonstrate how moisture permeation data from polymer films can be used to estimate moisture ingress rates and compare the results of these two methods. Encapsulant materials were also evaluated for comparison and to highlight the need for edge seals. Of the materials studied, dessicant-filled polyisobutene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.
Series Statement
- NREL/PR -- 5200-50839
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