Suppressed decomposition of organometal halide perovskites by impermeable electron-extraction layers in inverted solar cells

The area of thin-film photovoltaics has been overwhelmed by organometal halide perovskites. Unfortunately, serious stability concerns arise with perovskite solar cells. For example, methyl-ammonium lead iodide is known to decompose in the presence of water and, more severely, even under inert condit...

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Bibliographic Details
Published in:Nature communications 2017-01, Vol.8 (1), p.13938-13938, Article 13938
Main Authors: Brinkmann, K.O., Zhao, J., Pourdavoud, N., Becker, T., Hu, T., Olthof, S., Meerholz, K., Hoffmann, L., Gahlmann, T., Heiderhoff, R., Oszajca, M. F., Luechinger, N. A., Rogalla, D., Chen, Y., Cheng, B., Riedl, T
Format: Article
Language:English
Subjects:
140/146
639/301/1005/1007
639/301/299/946
Decomposition
Electrodes
Humanities and Social Sciences
multidisciplinary
Nanoparticles
Science
Science (multidisciplinary)
Tin
Zinc oxides
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Summary:The area of thin-film photovoltaics has been overwhelmed by organometal halide perovskites. Unfortunately, serious stability concerns arise with perovskite solar cells. For example, methyl-ammonium lead iodide is known to decompose in the presence of water and, more severely, even under inert conditions at elevated temperatures. Here, we demonstrate inverted perovskite solar cells, in which the decomposition of the perovskite is significantly mitigated even at elevated temperatures. Specifically, we introduce a bilayered electron-extraction interlayer consisting of aluminium-doped zinc oxide and tin oxide. We evidence tin oxide grown by atomic layer deposition does form an outstandingly dense gas permeation barrier that effectively hinders the ingress of moisture towards the perovskite and—more importantly—it prevents the egress of decomposition products of the perovskite. Thereby, the overall decomposition of the perovskite is significantly suppressed, leading to an outstanding device stability. The stability issue of perovskite-based solar cells is in part due to electrode corrosion. Here, Brinkmann et al . develop an impermeable bilayered electron-extraction layer between the active layer and the electrode, suppressing decomposition of the perovskite and preventing corrosion from the inside.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms13938