Barretta, C.; Christoefl, P.; Buijsch, F.O.; Sals, S.; Jeangros, Q.; Stannowski, B.; Kuehne, M.; Oreski, G.: Guidelines for Selection of Encapsulant Materials for Modules Using Perovskite/Si Tandem Cells. In: 2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC) : 9-14 June 2024Piscataway, NJ: IEEE, 2024. - ISBN 978-1-6654-6426-0, p. 486-488
10.1109/pvsc57443.2024.10749124
Abstract:
Encapsulant materials in photovoltaic (PV) modules are essential for ensuring transparency, mechanical stability, electrical insulation, and protection against environmental stress factors. While ethylene vinyl acetate (EVA) has traditionally dominated the market, recent advancements introduce new materials based on ethylene co-polymers. This shift is attributed to the potential drawbacks of EVA, such as acetic acid generation leading to corrosion under field exposure. The study evaluates commercially available encapsulants, focusing on thermal properties, chemical structure, crosslinking behavior, and rheology, with a specific emphasis on perovskite/Si tandem cells. Addressing the unique challenges posed by perovskite/Si tandem cells, the research emphasizes the need for encapsulant materials that accommodate the temperature-sensitive nature of perovskite solar cells. Factors like low residual stresses, minimal shrinkage and low viscosity are critical for successful encapsulation. The encapsulant materials are characterized with different methods to gain knowledge into crosslinking behaviors, chemical compositions, and viscoelastic properties. The results facilitate the selection of suitable encapsulants for perovskite/Si tandem cells, aiming to reduce failure rates during lamination, enhance stability, and support the industrial-scale implementation of this promising PV technology. The presented findings contribute valuable guidelines for encapsulant selection, essential for optimizing the performance and reliability of perovskite/Si tandem solar cells in real-world applications.