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Highly efficient halogen-free solvent processed small-molecule organic solar cells enabled by material design and device engineering

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Abstract

Low bandgap small molecules, BDTTNTTR and BDTSTNTTR, with benzo[1,2-b:4,5-b′]dithiophene (BDT) as the central donor unit and naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole (NT) as the second acceptor block, which were also π-bridged with terthiophenes on both sides, and end-capped with 3-ethylrhodanine electron-accepting groups, have been successfully synthesized for highly efficient small molecule solar cells (SM-OSCs). Based on tactful material design and device engineering, the resulting SM-OSCs processed with a halogen-free solvent of CS2 exhibited a high efficiency of 11.53% with a very small energy loss of 0.57 eV.

Graphical abstract: Highly efficient halogen-free solvent processed small-molecule organic solar cells enabled by material design and device engineering

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Publication details

The article was received on 22 Mar 2017, accepted on 05 Jun 2017 and first published on 05 Jun 2017


Article type: Communication
DOI: 10.1039/C7EE00805H
Citation: Energy Environ. Sci., 2017, Advance Article
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    Highly efficient halogen-free solvent processed small-molecule organic solar cells enabled by material design and device engineering

    J. Wan, X. Xu, G. Zhang, Y. Li, K. Feng and Q. Peng, Energy Environ. Sci., 2017, Advance Article , DOI: 10.1039/C7EE00805H

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