We present a highly efficient tandem solar cell based on a merocyanine dye, containing two identical subcells connected in series. A recombination layer of Al/MoO3 was used. Due to a substantial improvement of the fill factor, the overall efficiency of the tandem cell was even higher than that of the single-cell reference with identical active layer thickness. By combining the planar heterojunction and the bulk heterojunction concept, efficiencies up to 4.8% were achieved while maintaining a rather simple, fully vacuum-processed device stack consisting of only four organic layers. The optimized open-circuit voltage was as large as 2.1 V. © 2011 American Institute of Physics.
CITATION STYLE
Steinmann, V., Kronenberg, N. M., Lenze, M. R., Graf, S. M., Hertel, D., Bürckstümmer, H., … Meerholz, K. (2011). A simple merocyanine tandem solar cell with extraordinarily high open-circuit voltage. Applied Physics Letters, 99(19). https://doi.org/10.1063/1.3657145
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