研究目的
Understanding the interface strength between backsheet and encapsulant materials and their degradation with typical environments in tropical and near-ocean regions to enable robust and reliable solar PV technology for such regions.
研究成果
Salinity weakens the interface adhesion strength between TPO backsheet and EVA encapsulant. The single cantilever beam test method using the Delaminator v.8.2 adhesion testing system produces very quantitative and repeatable data and can be used to study how interface adhesion between various layers degrade with moisture and salt mist.
研究不足
The study focuses on the effect of salinity and humidity on the interface adhesion strength between backsheet and encapsulant, but other environmental factors may also influence the degradation of PV modules.
1：Experimental Design and Method Selection:
Single Cantilever Beam bending test method using Delaminator v
2：2 Adhesion testing system was used to quantify the delamination strength in multilayered PV module under extreme tropical environments inside environmental oven chamber. Sample Selection and Data Sources:
Mini modules consisting of a TPO backsheet layer, an EVA encapsulant, and a glass at the front side were used.
3：List of Experimental Equipment and Materials:
Delaminator v
4：2 Adhesion testing system, environmental oven chamber, PMMA beam, superglue (ethyl2-cyanoacrylate), accelerant (sodium bicarbonate). Experimental Procedures and Operational Workflow:
Modules were exposed to damp heat and salt damp heat chambers at 100° C and 100% relative humidity (RH). Delamination strength was measured after 168 and 336 hours.
5：Data Analysis Methods:
The delamination driving force (G) was calculated and the critical crack extension force (Gc) was found as it is the value of G where the load displacement curve starts to deviate from linearity.
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