Conjugated molecules, oligomers and polymers with intimately interacting donor-acceptor moieties provide light harvesting and electronic energy levels that can be tuned to optimize their utility in both bulk heterojunction and dye sensitized solar cell applications.  In this presentation, we will explore the combination and interaction of a breadth of electron rich and electron poor species.  Using dithienogermole and dithienosilole as donors in DA polymers, in conjunction with fullerene blend morphology control and solar cell device architecture, have lead to AM1.5 power conversion efficiencies in excess of 8%. Donor-Acceptor-Donor (DAD) triads with internally fused DA cores provide a means of examining the directionality of conjugation in charge injection to metal oxide electrodes.  Isoindigo-based polymers using a selection of electron accepting co-monomers, provides n-type doping characteristics, and their use in DAD molecular systems yields bulk heterojunctions with high morphological reproducibility.

Donor-acceptor conjugated molecules, oligomers and polymers in organic and hybrid photovoltaic systems

247th National Meeting (2014)

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