Organic solar cells based on acceptor-functionalized diketopyrrolopyrrole derivatives

Sanjay S. Ghosh; Luis A. Serrano; Bernd Ebenhoch; Vincent M. Rotello; Graeme Cooke; Ifor D.  W. Samuel

doi:10.1117/1.JPE.5.057215

12 June 2015 Organic solar cells based on acceptor-functionalized diketopyrrolopyrrole derivatives

Sanjay S. Ghosh, Luis A. Serrano, Bernd Ebenhoch, Vincent M. Rotello, Graeme Cooke, Ifor D. W. Samuel

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Funded by: UK Engineering and Physical Sciences Research Council (EPSRC)

Journal of Photonics for Energy, Vol. 5, Issue 1, 057215 (June 2015). https://doi.org/10.1117/1.JPE.5.057215

Abstract

The synthesis and characterization of three solution processable diketopyrrolopyrrole (DPP) derivatives featuring acceptor units attached to the core by alkyne linker units is reported. Cyclic voltammetry and density functional theory calculations indicate that the DPP derivatives possess similar HOMO and LUMO energies. Solar cells were fabricated by blending the synthesized DPP derivatives with [6,6]-phenyl-C71-butyrate methyl ester. The influence of donor:acceptor blend ratio, film thickness, annealing temperature, and annealing time on device performance was studied. Differences in device performance were related to atomic force microscopy measurements of the films. The highest power conversion efficiency of 1.76% was achieved for the DPP derivative functionalized with an aldehyde electron-withdrawing group with a 1∶0.7 donor:acceptor ratio when the active layer was annealed for 10 min at 110°C.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Sanjay S. Ghosh, Luis A. Serrano, Bernd Ebenhoch, Vincent M. Rotello, Graeme Cooke, and Ifor D. W. Samuel "Organic solar cells based on acceptor-functionalized diketopyrrolopyrrole derivatives," Journal of Photonics for Energy 5(1), 057215 (12 June 2015). https://doi.org/10.1117/1.JPE.5.057215

Published: 12 June 2015

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