DOI: https://doi.org/10.29363/nanoge.pvspace.2022.002
Publication date: 8th June 2022
Thin-film solar cells with perovskite absorbers combine multiple advantages for space applications such as high efficiency, excellent radiation hardness and the ability for various combinations of tandem solar cells. However, most high-efficiency perovskites are still deposited on very small areas and on rigid substrates, which strictly limits their potential applications.
Therefore, in this contribution, we evaluate the transition from spin-coated layers on small areas to doctor blade and slot-die coated layers. This includes process optimizations on small area such as passivation and composition engineering and their transfer and necessary adjustments to scalable techniques, e.g. by using wetting agents or tailoring the precursor solution. For slot-die coated absorbers, efficiencies up to 16 % were achieved. In order to minimize the environmental impact, green solvents without the widely used but toxic dimethylformamide will be discussed.
After optimizing the slot-die coated perovskite layers on rigid substrates, the deposition was transferred to flexible substrates. Here, additionally the hole and electron transport layers were deposited by slot-die coating leading to all slot-die-coated solar cells.
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 850937.
This work was supported by the Federal Ministry for Economic Affairs and Climate Action (BMWK) under the ontract number 03EE1038A (CAPITANO).
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