Title :
New barrier coating materials for PV module backsheets
Author :
Barber, Greg D. ; Jorgensen, Gary J. ; Terwilliger, K. ; Glick, S.H. ; Pern, J. ; McMahon, T.J.
Author_Institution :
Nat. Center for Photovoltaics, Nat. Renewable Energy Lab., Golden, CO, USA
Abstract :
High moisture barrier high resistivity coatings on polyethylene terepthalate (PET) have been fabricated and characterized for use in PV module back sheet applications. These thin film barriers exhibit water vapor transmission rates (WVTR) as low as 0.1 g/m2-day at 37.8°C and have shown excellent adhesion (> 10 N/mm) to both ethylene vinyl acetate (EVA) and PET even after filtered xenon arc lamp UV exposure. The WVTR and adhesion values for this construction are compared to and shown to be superior to candidate polymeric backsheet materials.
Keywords :
adhesion; electrical resistivity; insulating thin films; life testing; polymers; protective coatings; solar cell arrays; PV module backsheets; accelerated testing; adhesion; barrier coating materials; ethylene vinyl acetate; filtered xenon arc lamp UV exposure; high moisture barrier coatings; high resistivity coatings; polyethylene terepthalate; thin film barriers; water vapor transmission rates; Adhesives; Coatings; Conductivity; Moisture; Polyethylene; Polymers; Positron emission tomography; Sheet materials; Transistors; Xenon;
Conference_Titel :
Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE
Print_ISBN :
0-7803-7471-1
DOI :
10.1109/PVSC.2002.1190906
