19 May 2010 Efficient and long-term stable organic vacuum deposited tandem solar cells
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Abstract
We report on the latest progress in the field of organic p-i-n tandem solar cells. The external quantum efficiencies of a tandem solar cell with two complementary absorbing bulk heterojunctions with an efficiency of 6.07% (certified by Fraunhofer ISE) with an active area of about 2cm2 is analyzed. These solar cells are extremely stable: a reduction of only 3% of its initial power conversion efficiency was measured when stored at 85°C for 5000 hours. The solar cell does not show any reduction in efficiency when stored under continuous illumination of a tungsten lamp corresponding to 1.5 suns for 5000 hours. Furthermore, we present the latest results on optimized tandem solar cells showing a power conversion efficiency of 7.66 % (certified by Fraunhofer ISE, active area of 1.1cm2).
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Christian L. Uhrich, Gregor Schwartz, Bert Maennig, Wolf M. Gnehr, Stefan Sonntag, Oliver Erfurth, Eginhard Wollrab, Karsten Walzer, Jan Foerster, Andre Weiss, Olga Tsaryova, Karl Leo, Moritz K. Riede, Martin Pfeiffer, "Efficient and long-term stable organic vacuum deposited tandem solar cells", Proc. SPIE 7722, Organic Photonics IV, 77220G (19 May 2010); doi: 10.1117/12.855088; https://doi.org/10.1117/12.855088
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