Application methods for graphite as catalyzer in dye-sensitized solar cells - Hölscher, Florian; Trümper, Peer-Robin; Juhász Junger, Irén; Schwenzfeier-Hellkamp, Eva; Ehrmann, Andrea; Institut für Technische Energie-Systeme (Optik, 2019)
Dye-sensitized solar cells (DSSCs) belong to the possible technologies on which fu-ture clean energy harvesting can be based. Opposite to silicon-based photovoltaics, DSSCs can be produced purely from non-toxic, inexpensive materials. Nevertheless, nowadays most research is performed aiming at increasing the efficiency of DSSCs based on (mostly toxic) ruthenium dyes or perovskites. In this paper, examinations include only non-toxic substances due to the planned subsequent use in textile fab-rics, i.e. to TiO2, graphite, iodine/tri-iodide as electrolyte and an anthocyanin dye. Dif-ferent application methods for the graphite layer of DSSCs were compared, focusing on such techniques which could also be applied on textile fabrics. A mixture of con-ductive silicone rubber and graphite powder resulted in the highest efficiencies, as compared to graphite pen, graphite spray, and coating with graphite flakes. In com-parison to DSSCs with a pencil-made graphite layer, the power density could be in-creased by a factor of 2 by the new composite material.
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Keywords: article