Volume 4, Issue 11 pp. 1455-1462
Full Paper

A Systematic Investigation of Permeation Barriers for Flexible Dye-Sensitized Solar Cells

Dr. Francesca De Rossi

Dr. Francesca De Rossi

C.H.O.S.E. Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy

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Dr. Girolamo Mincuzzi

Dr. Girolamo Mincuzzi

C.H.O.S.E. Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy

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Dr. Francesco Di Giacomo

Dr. Francesco Di Giacomo

C.H.O.S.E. Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy

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Dr. John Fahlteich

Dr. John Fahlteich

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, Winterbergstraße 28, 01277 Dresden, Germany

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Dr. Sabine Amberg-Schwab

Dr. Sabine Amberg-Schwab

Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, 97082 Würzburg, Germany

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Dr. Klaus Noller

Dr. Klaus Noller

Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Strasse 35, 85354 Freising, Germany

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Prof. Thomas M. Brown

Corresponding Author

Prof. Thomas M. Brown

C.H.O.S.E. Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy

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First published: 01 September 2016
Citations: 18

Abstract

Dye solar cells (DSCs), in their flexible form, are prone to ageing due to ingress of gas as a result of the intrinsic permeability of polymer substrates. Thus, it is important to develop proper encapsulation strategies to limit degradation. Literature on flexible DSCs lacks comparative tests with different permeation barriers, including flexible ultrahigh barriers (UHB). We designed such tests and applied UHBs to flexible DSCs for the first time. We demonstrate that UHBs double the lifetime of cells with respect to those with none or less-effective barriers. Degradation is due to a combination of electrolyte bleaching, dye detachment, and indium tin oxide (ITO) degradation. The reduced, though still noticeable, performance loss for UHB- and glass-equipped cells can be mainly ascribed to lateral permeation of gas/water, suggesting that efficient solutions for edge encapsulation must be developed to extend lifetimes further.

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