Journal
SCIENCE
Volume 358, Issue 6367, Pages 1192-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao5561
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Funding
- SAOT at FAU Erlangen-Nurnberg
- German Research Foundation [Deutsche Forschungsgemeinschaft (DFG)]
- Cluster of Excellence Engineering of Advanced Materials
- DFG research training group GRK 1896 at FAU
- Bavarian Ministry of Economic Affairs and Media, Energy and Technology
- Aufbruch Bayern initiative of the state of Bavaria
- Bavarian Initiative Solar Technologies go Hybrid (SolTech)
- Solar Factory of the Future
- Energy Campus Nurnberg (EnCN)
- Emerging Talents Initiative at FAU
- DFG [BR 4031/13-1]
- EPSRC [EP/M024881/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M024881/1] Funding Source: researchfish
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A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is interface loss in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials without compromising efficiency, stability, or scalability of perovskite solar cells. Tantalum-doped tungsten oxide (Ta-WOx)/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers. In a simple device with regular planar architecture and a self-assembled monolayer, Ta-WOx-doped interface-based perovskite solar cells achieve maximum efficiencies of 21.2% and offer more than 1000 hours of light stability. By eliminating additional ionic dopants, these findings open up the entire class of organics as scalable hole-transporting materials for perovskite solar cells.
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