期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-018-07807-5
关键词
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资金
- China Scholarship Council (CSC)
- Deutsche Forschungsgemeinschaft (DFG) [INST 90/825-1 FUGG, INST 90/751-1 FUGG, INST 90/827-1 FUGG]
- Cluster of Excellence Engineering of Advanced Materials (EAM)
- research training group GRK 1896 In-Situ Microscopy with Electrons, Xrays and Scanning Probes
- research unit FOR 1878 Functional Molecular Structures on Complex Oxide Surfaces
- German Federal Ministry of Education and Research (BMBF) [05K16WEB, 05K16WE1]
- BMBF [05K16WED]
- DFG [BR 4031/13-1]
- Bavarian Ministry of Economic Affairs and Media, Energy, and Technology [IEK11]
- Aufbruch Bayern initiative of the state of Bavaria (EnCN)
- Aufbruch Bayern initiative of the state of Bavaria (Solar Factory of the Future)
- Bavarian Initiative Solar Technologies go Hybrid (SolTech)
- SFB 953 (DFG)
- EPSRC [1822223] Funding Source: UKRI
There is a strong market driven need for processing organic photovoltaics from eco-friendly solvents. Water-dispersed organic semiconducting nanoparticles (NPs) satisfy these premises convincingly. However, the necessity of surfactants, which are inevitable for stabilizing NPs, is a major obstacle towards realizing competitive power conversion efficiencies for water-processed devices. Here, we report on a concept for minimizing the adverse impact of surfactants on solar cell performance. A poloxamer facilitates the purification of organic semiconducting NPs through stripping excess surfactants from aqueous dispersion. The use of surfactant-stripped NPs based on poly(3-hexylthiophene) / non-fullerene acceptor leads to a device efficiency and stability comparable to the one from devices processed by halogenated solvents. A record efficiency of 7.5% is achieved for NP devices based on a low-band gap polymer system. This elegant approach opens an avenue that future organic photovoltaics processing may be indeed based on non-toxic water-based nanoparticle inks.
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