1 Risø National Laboratory for Sustainable Energy, Technical University of Denmark2 Solar Energy Programme, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3 Department of Chemical and Biochemical Engineering, Technical University of Denmark4 Department of Energy Conversion and Storage, Technical University of Denmark
In this paper, we address optimizations of dye sensitized solar cells (DSSCs) through the combination of important issues like semi-transparency, quasi-solid-state constructions and low-cost realization of serially connected modules. DSSCs with a transparency of 50% in the visible region, moderate efficiency similar to 1%, and long lifetime allow solar cells application in building elements like windows, facades and semi-transparent roofs. The use in DSSCs of gel polymer electrolytes prepared by liquid electrolyte incorporation into a polymer matrix such as poly-methyl-methacrylate presents encouraging results. A short circuit current (I-sc) of 4.45 mA cm(-2) with an open circuit voltage (V-oc) of 0.5 V were recorded in standard solar cells sensitized by cis-bis(thiocyano) ruthenium(II)-bis-2, 2'-bipyridine-4, 4'-dicarboxylate. Up-scaling tests demonstrate the easy realization of a 625 cm(2) module connected in series which allows power extraction up to similar to 100 mW with an I-sc of 25.1 mA and a V-oc of 10.65V under AM 1.5, 100 mW cm(-2) standard conditions. Losses are minimized by using a low-current/high-voltage coupling scheme. (c) 2006 Elsevier B.V. All rights reserved.
Solar Energy Materials and Solar Cells, 2006, Vol 90, Issue 16, p. 2575-2588