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Issue 32, 2017
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A non-fullerene acceptor with a diagnostic morphological handle for streamlined screening of donor materials in organic solar cells

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Abstract

Utilizing the N-annulated PDI acceptor PDI–DPP–PDI, a simple air-processed and air-tested organic photovoltaic device fabrication procedure has been established to streamline the screening of donor materials. Post-deposition solvent vapour annealing of the active layer blend results in a preferential re-organization dictated by PDI–DPP–PDI and is responsible for significant increases in device performance. Employing this method, a series of low-cost and scalable donor polymers were screened to help select promising candidates as alternatives to the expensive high-performance donor polymer PTB7-Th. Universal improvements in performance upon solvent vapour annealing with a range of donor polymers highlighted the advantages of PDI–DPP–PDI and this post-deposition treatment. This facile screening protocol identified PDTT-BOBT as the most suitable PTB7-Th alternative in the surveyed series, with the best device efficiencies reaching 4.5% PCE compared to control devices with PTB7-Th at 4.6% PCE.

Graphical abstract: A non-fullerene acceptor with a diagnostic morphological handle for streamlined screening of donor materials in organic solar cells

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Publication details

The article was received on 17 Jun 2017, accepted on 20 Jul 2017 and first published on 20 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA05282K
Citation: J. Mater. Chem. A, 2017,5, 16907-16913
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    A non-fullerene acceptor with a diagnostic morphological handle for streamlined screening of donor materials in organic solar cells

    Seth M. McAfee, A. Payne, S. V. Dayneko, G. P. Kini, C. E. Song, J. Lee and G. C. Welch, J. Mater. Chem. A, 2017, 5, 16907
    DOI: 10.1039/C7TA05282K

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