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An A-D-A’-D-A Type Small Molecule Acceptor with Broad Absorption Spectrum for Organic Solar Cells

Abstract

Organic molecules with wide absorption spectra indicate great sunlight harvesting capability and are critically important for solar cell applications. In this manuscript, we develop an A-D-A’-D-A type small molecule acceptor (IID-IC) using isoindigo (IID) as the electron-deficient core unit (A’), thiophene as the electron-rich bridging units (D) and 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) as the electron-deficient endcapping groups (A). IID-IC shows wide absorption spectrum with the full width at half maximum (FWHM) of 190 nm, which is almost one time larger than that of typical A-D-A type molecule acceptors. The wide absorption spectrum of IID-IC is possibly due to the partially suppressed intramolecular charge transfer effect with the additional electron-deficient core unit. Organic solar cell (OSC) device based on IID-IC exhibits the power conversion efficiency of 2.82% with broad photoresponse from 320 nm to 780 nm.

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Publication details

The article was received on 04 Nov 2017, accepted on 06 Dec 2017 and first published on 06 Dec 2017


Article type: Communication
DOI: 10.1039/C7CC08497H
Citation: Chem. Commun., 2017, Accepted Manuscript
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    An A-D-A’-D-A Type Small Molecule Acceptor with Broad Absorption Spectrum for Organic Solar Cells

    J. Miao, B. Meng, J. Liu and L. Wang, Chem. Commun., 2017, Accepted Manuscript , DOI: 10.1039/C7CC08497H

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