High Performance Barrier Films for Flexible Photovoltaic Module Encapsulation
| Autor: | Spanring, J., Droisner, A., Erler, B., Kraxner, M., Krumlacher, W., Plessing, A., Ruplitsch, A., Skringer, A., Steiner, A. |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
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| DOI: | 10.4229/24theupvsec2009-1cv.3.11 |
| Popis: | 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 266-269 With the development of flexible, weather-resistant high barrier materials for the encapsulation of flexible solar cells an innovative, resource-friendly production process for photovoltaic modules can be achieved. The market of flexible thin film and organic solar cells, such as amorphous silicon (a-Si), microcrystalline silicon (μc-Si), Copper-Indium-Gallium-Selenide (CIGS) and Copper-Indium-Diselenide (CIS) cells is growing very fast requiring new techonolgies in terms of cell production and encapsulation. Today state of the art is encapsulating flexible modules with glass – glass or glass – backsheet set-ups. The used backsheets provide an incorporated moisture barrier such as an aluminum foil or a metal oxid like AlOx or SiOx. Such encapsulated modules are limited in flexibility. Consequently the development of flexible, rollable high barrier material is crucial for thin film and organic solar cells. However requirements for flexible encapsulation material in terms of transparency, weatherability and permeability of gases are very challenging. Transparency of at least 85 % and permeation values as low as 10-5 g/cm2d for water vapor transition (WVTR) and respectively 10-5 cm3/m2datm for oxygen transition (OTR) are needed to protect flexible cell systems. Beside material development processability of the high barrier material in roll to roll manner is very important. The principle for establishing a flexible high barrier material is a polymer substrate delivering sufficient mechanical strength and thermal resistance. The polymer substrate is combined with inorganic layers, such as MeOx (SiOx, AlOx) layers and functional barrier coatings of tailor made hybrid polymers concerning adhesion, UV stability or weatherability. With the use of weather-resistant high barrier materials flexible solar cells can be enccasulated in large quantities in a roll to roll process. An innovative, resource-friendly production process for photovoltaic modules can be achieved. |
| Databáze: | OpenAIRE |
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