engleski

Geopolymer materials developed in a configuration suitable for photovoltaic application

Geopolymers are nowadays considered as the third generation of concrete due to their sustainability in the preparation of cement. Specifically, a much lower environmental footprint is present which significantly reduces CO2 emission and helps in terms of resolving environmental issues worldwide. Certain contributions in the overlapping area of construction and energy materials could arise from preparing geopolymers in the form of a paste, which is then further developed into thin-films. In this work, we focused on chemical and (micro)structural changes that occur during the curing of (pre)mullite-based geopolymers. The influence of various factors was tested, such as the presence of ions in the activation solution and presence of additives for acgieveing desired properties of the composite. Therefore, we prepared samples in bulk and thin- film configuration which were characterized by DTA-TGA, XRD, SEM, MAS NMR and SS-IS. Particular attention was devoted to improving conductivity by adding various conductive polymers to the geopolymer matrix. Obtained results enabled a better understanding of the patway towards desired properties. We present a challenging shift from relatively porous bulk to thin-films, broadening the applicability of geopolymers to vertically mounted solar-cells.

geopolymers ; MAS NMR ; thin films ; solar cells ; SS-IS

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