Xie C, Heumüller T, Gruber W, Tang X, Classen A, Schuldes I, Bidwell M, Späth A, Fink R, Unruh T, Mcculloch I, Li N, Brabec C (2018)
Publication Language: English
Publication Status: Published
Publication Type: Journal article
Publication year: 2018
Publisher: NATURE PUBLISHING GROUP
Book Volume: 8
Article Number: 1702857
Journal Issue: 13
DOI: 10.1038/s41467-018-07807-5
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.
APA:
Xie, C., Heumüller, T., Gruber, W., Tang, X., Classen, A., Schuldes, I.,... Brabec, C. (2018). Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects. Nature Communications, 8(13). https://doi.org/10.1038/s41467-018-07807-5
MLA:
Xie, Chen, et al. "Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects." Nature Communications 8.13 (2018).
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