Diketopyrrolopyrroles as acceptor materials in organic photovoltaics

B.P. Karsten, J.C. Bijleveld, R.A.J. Janssen

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77 Citations (Scopus)
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Abstract

In the search of new electron acceptor, n-type materials for organic solar cells that combine a strong absorption over a broad range with good electrical characteristics, the use of diketopyrrolopyrrole (DPP) derivatives with low reduction potentials is explored. A series of small molecule DPP derivatives is presented and the compounds are tested as electron acceptors in combination with poly(3-hexylthiophene) (P3HT) as the donor material. Working photovoltaic devices are obtained that show a photoresponse in the wavelength region where the DPP molecules absorb. The best device shows a power conversion efficiency of 0.31% in simulated solar light, with a photon-to-electron conversion efficiency of ~10% up to 700¿nm. The efficiency seems to be limited by the coarse morphology of the blend.
Original languageEnglish
Pages (from-to)1554-1559
JournalMacromolecular Rapid Communications
Volume31
Issue number17
DOIs
Publication statusPublished - 2010

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