Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
A successful commercial application of organic solar cells is mainly determined by three factors: power conversion efficiency, costs and lifetime of the device. In this contribution we focus on the investigation of device stability employing imaging techniques. Several studies have already shown that often still the charge extracting and conducting electrodes may limit the overall device lifetime. Imaging characterization is especially well-suited for the investigation of device degradation as it constitutes a non-invasive measurement that can be repeatedly be applied on one and the same device during ageing. For example electrode oxidation and delamination and its penetration through photoactive layers can be readily investigated via luminescence and thermography imaging, respectively. We present several examples of electrode controlled device degradation by application of automated ageing setups in combination with imaging characterization. As a result we obtained a considerably more stable OPV device, approaching 20000 hours of extrapolated operation lifetime. In addition it is demonstrated that via imaging quantitative information can be obtained, enabling more precise predictions for device lifetime in the future.
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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