5 February 2001 Stability issues of conjugated polymer/fullerene solar cells from a chemical viewpoint
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Abstract
The efficiency of energy conversion and the stability of lifetime of `plastic' photovoltaic cells, based on conjugated polymer/fullerene blends, are the two main issues to be improved for this type of devices. The stability of these PV cells depends potentially on a large number of factors. A brief layer-to-layer overview of these factors is given, with main emphasis on the factors possibly playing a role in the active photovoltaic layer consisting of the interpenetrating network of a conjugated polymer and a fullerene derivative. Complicated sets of photochemical processes can take place in the pure materials and in the donor-acceptor blends, both in the absence and in the presence of oxygen. Especially, photochemical [2+2] cycloaddition and cycloreversion processes have been observed for fullerene derivatives and in certain mixtures containing an oligomer and a fullerene derivative. These and other (photo) chemical processes are very likely to have an influence on the performance of the photovoltaic cell.
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Jan C. Hummelen, Jan C. Hummelen, Joop Knol, Joop Knol, Luis Sanchez, Luis Sanchez, } "Stability issues of conjugated polymer/fullerene solar cells from a chemical viewpoint", Proc. SPIE 4108, Organic Photovoltaics, (5 February 2001); doi: 10.1117/12.416934; https://doi.org/10.1117/12.416934
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