Influence of oxygen on semi-transparent organic solar cells with gas permeable electrodes

✍ Scribed by Andrea Seemann; H.-J. Egelhaaf; Christoph J. Brabec; Jens A. Hauch

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 453 KB
• Volume: 10
• Category: Article
• ISSN: 1566-1199
• DOI: 10.1016/j.orgel.2009.08.001

✦ Synopsis

Semi-transparent P3HT:PCBM (poly(3-hexylthiophene): [6,6]-phenyl C61 butyric acid methyl ester) solar cells with high conductivity PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)) top electrodes are used to study degradation. Due to the gas permeability of this type of electrode, the simultaneous exposure to oxygen and light leads to a strong decrease of the short circuit current on the timescale of minutes. The losses are not due to a change in the conductivity of the PEDOT:PSS layer, and the short circuit current can be partially recovered by a heating step, indicating that the observed degradation is taking place in the photo-active layer of the cell.