1. Perovskite/CIGS tandem solar cells
- Author
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Jošt, Marko, Köhnen, Eike, Al-Ashouri, Amran, Bertram, Tobias, Tomšič, Špela, Magomedov, Artiom, Kasparavičius, Ernestas, Kodalle, Tim, Lipovšek, Benjamin, Getautis, Vytautas, Schlatmann, Rutger, Kaufmann, Christian A., Albrecht, Steve, and Topič, Marko
- Subjects
udc:621.383.51 ,electrical conductivity ,perovskites ,power conversion efficiency ,photovoltaics ,perovskite tandem solar cells ,optical optimization ,perovskitne tandemske sončne celice ,solar cells ,optična optimizacija ,layers ,fotovoltaika ,energijski izplen ,energy yield - Abstract
We demonstrate a monolithic perovskite/CIGS tandem solar cell with a certified power conversion efficiency (PCE) of 24.2%. The tandem solar cell still exhibits photocurrent mismatch between the subcells thus optical simulations are used to determine the optimal device stack. Results reveal a high optical potential with the optimized device reaching a short-circuit current density of 19.9 mA cm$^{−2}$ and 32% PCE based on semiempirical material properties. To evaluate its energy yield, we first determine the CIGS temperature coefficient, which is at −0.38% K$^{−1}$ notably higher than the one from the perovskite subcell (−0.22% K$^{−1}$), favoring perovskite in the field operation at elevated cell temperatures. Both single-junction cells, however, are significantly outperformed by the combined tandem device. The enhancement in energy output is more than 50% in the case of CIGS single-junction device. The results demonstrate the high potential of perovskite/CIGS tandem solar cells, for which we describe optical guidelines toward 30% PCE.
- Published
- 2022