Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.340
Publication date: 18th December 2023
Stacking two perovskite layers with complementary bandgap in tandem device promise to exceed the efficiency limit of single-junction solar cells. In addition to high-efficiency potential, perovskite-perovskite (all-perovskite) thin-film tandems can be fabricated on flexible and lightweight substrates with very high power-to-weight ratios, thus opening numerous applications where flexibility and lightweight are important considerations. Leveraging low-temperature coating methods and high throughput roll-to-roll manufacturing, perovskite-based thin-film tandems promise very low manufacturing costs and CO2 footprint. Working towards our vision of roll-to-roll (R2R) manufacturing of flexible all-perovskite tandem solar modules, we present our latest progress on the development of highly efficient flexible all-perovskite tandem devices (Fig. 1). With interface and additive engineering, we demonstrate 25.4 % power conversion efficiency in a flexible 2-terminal all-perovskite tandem solar cell. Furthermore, we will present the first flexible all-perovskite tandem mini-modules and discuss the challenges of homogenous coating of perovskite on large areas using both scalable solution processes and vapor processes. Finally, we will discuss the potential and future challenges of developing highly efficient, lightweight, and stable all-perovskite tandem photovoltaics.
This work has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement no. 850937 of the PERCISTAND project, the Swiss Federal Office of Energy (SFOE, Project HIPEROS, grant no. SI/502549-01), and the Swiss National Science Foundation (grant no. 200021_213073).
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