Journal article

Liquid crystalline hexa-peri-hexabenzocoronene-diketopyrrolopyrrole organic dyes for photovoltaic applications

Wallace WH Wong, Jegadesan Subbiah, Sreenivasa R Puniredd, Balaji Purushothaman, Wojciech Pisula, Nigel Kirby, Klaus Muellen, David J Jones, Andrew B Holmes



A series of liquid crystalline organic dyes consisting of fluorenyl hexa-peri-hexabenzocoronene (FHBC) and diketopyrrolopyrrole (DPP) units was synthesised and characterised. Their thermotropic behaviour is a result of the strong π-π association between FHBC units while the DPP unit enhances light absorption. With small changes in the molecular structure, significant differences in molecular organisation were observed in solid state. In turn, the molecular arrangement led to variations in the semiconducting properties of these materials and, ultimately, their performance in organic solar cells. © 2012 The Royal Society of Chemistry.


Awarded by Australian Research Council

Awarded by European Community's Seventh Framework Programme ONE-P

Awarded by DFG Priority Program

Awarded by DFG

Awarded by ESF Project GOSPEL

Awarded by ERC Advanced Grant NANO-GRAPH

Funding Acknowledgements

This work was made possible by support from the Australian Solar Institute (Fellowship for W W H Wong and project grant), Australian Research Council (DP0877325), the Victorian Organic Solar Cell Consortium (, the Victorian State Government Department of Business Innovation (Victorian Science Agenda) and Department of Primary Industries (Energy Technology Innovation Strategy), the AAS-BMBF Australia-Germany Solar Photovoltaic Research Exchange Program, the German Science Foundation (Korean-German IR TG), the European Community's Seventh Framework Programme ONE-P (grant agreement no. 212311), DFG Priority Program SPP 1355, DFG MU 334/32-1, DFG Priority Program SPP 1459, ESF Project GOSPEL (Ref Nr: 09-Euro-GRAPHENE-FP-001) and ERC Advanced Grant NANO-GRAPH (AdG-2010-267160). The GI-WAXS experiments were undertaken on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia.