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ECN publication
Long term stability of dye sensitized solar cells for large area power applications : LOTS-DSC publishable report
Kroon, J.M.; Hinsch, A.; Roosmalen, J.A.M. van; Burg, N.P.G. van der; Bakker, N.J.; Kinderman, R.; Sommeling, P.M.; Späth, M.; Kern, R.; Sastrawan, R.; Ferber, J.; Schubert, M.; Hasenhindl, G.; Schill, C.; Lorenz, M.; Stangl, R.; Baumgärtner, S.; Peter, Ch.; Meyer, A.; Meyer, T.; Uhlendorf, I.; Holzbock, J.; Niepmann, R.
Published by: Publication date:
ECN Solar Energy 1-11-2001
ECN report number: Document type:
ECN-C--01-124 ECN publication
Number of pages: Full text:
11 Download PDF  

In this three-year project the project partners have worked on the long-term stability and efficiency of nanocrystalline Dye-sensitized Solar Cells (nc-DSC).Accelerated ageing tests on nc-DSC show that, to first order, a separation between the effects of the stress factors visible light soaking, UV-illumination and thermal treatment on the long-term stability can be made. The corresponding mechanisms are of electrochemical, photochemical and pure chemical nature respectively. It has been further proven that 2-valent salts like MgI2 and CaI2 as additives to the electrolyte have a strong stabilising effect during UV-illumination. Tests under continuos light soaking for several thousand hours demonstrate the ability of nc-DSCs to operate for at least 5 ? 10 years under outdoor illumination conditions without major degradations. Continuos and periodic thermal tests according to IEC 1215 norms are promising but with 30% to 40% loss in efficiency still critical. Certified AM1.5 efficiencies up to 8.2% have been reached for nc-DSC on areas larger 1 cm2, i.e. 2.5 cm2. A 2-Dimensional electrical model describing the contributions of the various cell components to the electrical behaviour has been developed.

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