Diketopyrrolopyrrole-based sensitizers for dye-sensitized solar cell applications: anchor engineering?

Journal of Materials Chemistry A Pub Date: 2013-09-20 DOI: 10.1039/C3TA13643D

Abstract

A series of donor–chromophore–anchor (D–C–A) sensitizers comprising the diketopyrrolopyrrole (DPP) chromophore were synthesized and tested in both I3?/I? and Co[(bpy)]3+/2+ redox shuttle DSC devices. The dye series was strategically designed to elucidate structure–property relationships, concerning overall performance and compatibility with these two electrolytes. Selective fluorine incorporation improved I3?/I?-based DSC performance, while hindering performance with the positively charged cobalt-based redox shuttle. Incorporation of a pyridine heterocycle into the DPP chromophore increased spectral breadth, but decreased performance metrics for both electrolyte systems. These results are understood through detailed electrochemical, photophysical, and computational studies.

Graphical abstract: Diketopyrrolopyrrole-based sensitizers for dye-sensitized solar cell applications: anchor engineering
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