LiquidGlass for Photovoltaics: Multifunctional Front Cover Glass for Solar Modules
2019
Advanced
optical concepts, making use of tailored microstructured front cover
glasses, promise to reduce the losses encountered with encapsulated
solar modules. However, implementing optical concepts into the conventional
architecture of encapsulated solar modules and simultaneously maintaining
high durability represent a severe technological challenge. The liquid
glass technique offers a route to meet this challenge by enabling
the implementation of these optical concepts directly into the durable
front cover glass of solar modules. In this work, we demonstrate for
the first time two showcases of texturing fused silica front cover
glass, using the facile liquid glass technique: (I) multifunctional
microcone textures that reduce front-side reflection losses by ∼80%
compared to a planar reference, which correlates to an increase in
short-circuit current density of encapsulated planar monocrystalline
silicon heterojunction solar cells by 2.9 mA cm–2, and exhibit strong hydrophilic behavior facilitating self-cleaning
and (II) embedded freeform surface cloaks that redirect incident light
away from the metallic contact grids of the solar cell and demonstrate
a cloaking efficiency of ∼88%.
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