By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators publish new report on Solar Energy. According to news reporting out of Roskilde, Denmark, by VerticalNews editors, research stated, "We demonstrate a method for the preparation of multijunction polymer solar cells without the use of vacuum evaporation methods or indium tin oxide (ITO). The entire layer stack is prepared by printing or coating of each layer."
Our news journalists obtained a quote from the research from the Technical University of Denmark, "The number of layers typically employed in complete devices exceeds ten and to efficiently identify layers and interfaces that are not robust we developed a double sided illumination method and demonstrate how layer thicknesses can be optimized with respect to the roll processing in the aim of achieving functional tandem devices. The devices were prepared directly on barrier foil and were later encapsulated. In this study the same active material comprising poly-3-hexylthiophene (P3HT) and phenyl-C-61-butyric acid methyl ester (PCBM) was employed using nanoparticle based zinc oxide for electron selectivity and several different PEDOT:PSS formulations for hole selectivity, electrode- and recombination layer formation. A novel slanted comb silver grid electrode structure was employed to enable efficient double sided illumination and minimize shunts. The operational stability of the tandem devices evaluated under ISOS-D-2 conditions demonstrated less variation in stability between devices than similar single junctions prepared in the same manner for reference."
According to the news editors, the research concluded: "We demonstrate lifetime studies for 480 h without any sign of degradation and estimate that the tandem or multijunction polymer solar cells are as stable as single junctions."
For more information on this research see: A rational method for developing and testing stable flexible indium- and vacuum-free multilayer tandem polymer solar cells comprising up to twelve roll processed layers. Solar Energy Materials and Solar Cells, 2014;120():735-743. Solar Energy Materials and Solar Cells can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Solar Energy Materials and Solar Cells - www.elsevier.com/wps/product/cws_home/505675)
Our news journalists report that additional information may be obtained by contacting T.R. Andersen, Technical University of Denmark, Dept. of Energy Convers & Storage, DK-4000 Roskilde, Denmark. Additional authors for this research include H.E. Dam, B. Andreasen, M. Hosel, M.V. Madsen, S.A. Gevorgyan, R.R. Sondergaard, M. Jorgensen and F.C. Krebs.
Keywords for this news article include: Europe, Denmark, Roskilde, Solar Energy
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC