Modified EVA Encapsulant Formulations for Low Temperature Processing: Preprint

Conference · Mon Oct 01 00:00:00 EDT 2001

OSTI ID:15000040

Mei, Z; Pern, F J; Glick, S H

Presented at the 2001 NCPV Program Review Meeting: We have developed several new ethylene-vinyl acetate (EVA) formulations modified on the basis of NREL patented EVA formulations [1]. The new formulations can be cured to a desired gel content of {approx}80% in the ambient at temperatures 20-30 C lower than the typical conditions in vacuum (i.e. {approx}150 C). Glass/glass laminates showed transmittance spectra that are essentially the same as that of EVA 15295P in the visible and NIR regions but higher in the UV region. Results of fluorescence analysis of the ambient-processed new EVA formulations showed the concentrations of the curing-generated {alpha},{beta}-unsaturated carbonyl chromophores, which are responsible for the UV induced EVA discoloration and photodegradation, were considerably lower than that of EVA 15295P, therefore suggesting a better photochemical stability of new EVA formulations.

• Research Organization: National Renewable Energy Lab., Golden, CO. (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC36-99-GO10337
• OSTI ID: 15000040
• Report Number(s): NREL/CP-520-31027; TRN: US200325%%17
• Resource Relation: Conference: Presented at the NCPV Program Review Meeting, Lakewood, CO (US), 10/14/2001--10/17/2001; Other Information: PBD: 1 Oct 2001
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
14 SOLAR ENERGY
ENCAPSULATION
CURING
ACETATES
X-RAY FLUORESCENCE ANALYSIS
STABILITY
VISIBLE RADIATION
NEAR INFRARED RADIATION
ULTRAVIOLET RADIATION
SOLAR CELLS
PHOTOVOLTAICS
NCPV
EVA
ETHYLENE-VINYL ACETATE
ENCAPSULANTS
PHOTODEGRADATION
LOW-TEMPERATURE PROCESSING
SOLAR ENERGY - PHOTOVOLTAICS