Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-06709-w
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Funding
- Swiss National Science Foundation under the Scientific & Technological Cooperation Program Switzerland-Russia [IZLRZ2_164061]
- European Union's Horizon 2020 research and innovation program [687008]
- ERC Proof of concept grant [713681]
- Thousand Talent Program for Young Outstanding Scientists in China
- National Natural Science Foundation of China [21875081, 91733301]
- King Abdulaziz City for Science and Technology (KACST)
- Swiss National Science Foundation [200021_160112]
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Perovskite solar cells present one of the most prominent photovoltaic technologies, yet their stability, scalability, and engineering at the molecular level remain challenging. We demonstrate a concept of multifunctional molecular modulation of scalable and operationally stable perovskite solar cells that exhibit exceptional solar-to-electric power conversion efficiencies. The judiciously designed bifunctional molecular modulator SN links the mercapto-tetrazolium (S) and phenylammonium (N) moieties, which passivate the surface defects, while displaying a structure-directing function through interaction with the perovskite that induces the formation of large grain crystals of high electronic quality of the most thermally stable formamidinium cesium mixed lead iodide perovskite formulation. As a result, we achieve greatly enhanced solar cell performance with efficiencies exceeding 20% for active device areas above 1 cm(2) without the use of antisolvents, accompanied by outstanding operational stability under ambient conditions.
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