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Title: Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications

Abstract

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. 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 theevaluation 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 forcomparison and to highlight the need for edge seals. Of the materials studied, desiccant filled polyisobutylene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.

Authors:
; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1007341
Report Number(s):
NREL/CP-5200-47706
TRN: US201106%%224
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: 35th IEEE Photovoltaic Specialists Conference (PVSC '10), 20-25 June 2010, Honolulu, Hawaii
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; CORROSION; DESICCANTS; EVALUATION; GLASS; LIFETIME; MOISTURE; POLYMERS; SENSITIVITY; SIMULATION; TRANSPORT; WATER VAPOR; PV; moisture ingress; edge seal; PV durability

Citation Formats

Kempe, M D, Dameron, A A, Moricone, T J, and Reese, M O. Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications. United States: N. p., 2011. Web. doi:10.1109/PVSC.2010.5614463.
Kempe, M D, Dameron, A A, Moricone, T J, & Reese, M O. Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications. United States. doi:10.1109/PVSC.2010.5614463.
Kempe, M D, Dameron, A A, Moricone, T J, and Reese, M O. Tue . "Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications". United States. doi:10.1109/PVSC.2010.5614463. https://www.osti.gov/servlets/purl/1007341.
@article{osti_1007341,
title = {Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications},
author = {Kempe, M D and Dameron, A A and Moricone, T J and Reese, M O},
abstractNote = {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. 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 theevaluation 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 forcomparison and to highlight the need for edge seals. Of the materials studied, desiccant filled polyisobutylene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.},
doi = {10.1109/PVSC.2010.5614463},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {2}
}

Conference:
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