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Title: | Ionic high-performance light harvesting and carrier transporting OPV materials | Authors: | MAES, Wouter GHOOS, Toon KESTERS, Jurgen DRIJKONINGEN, Jeroen VANORMELINGEN, Wouter Malinkiewicz, Olga Bolink, H. J. LUTSEN, Laurence MANCA, Jean VANDERZANDE, Dirk |
Issue Date: | 2013 | Source: | Kafafi, ZH Lane, PA (Ed.). ORGANIC PHOTOVOLTAICS XIV | Series/Report: | Proceedings of SPIE | Abstract: | In this Proceedings paper, we report on the synthesis of a family of polythiophene-based conjugated polyelectrolytes, both homopolymers and random copolymers varying in the building block ratio and counter ions, toward a better fundamental understanding of the structure-property relations of these ionic derivatives in organic photovoltaics. One of the ionic homopolymers was successfully implemented as a donor material in fully solution-processed efficient bi-layer solar cells (up to 1.6% PCE in combination with PC71BM) prepared by the low impact meniscus coating technique. On the other hand, these imidazolium-substituted polythiophenes were also applied as materials for electron transport layers (ETLs), boosting the I-V properties of PCDTBT: PC71BM solar cell devices up to average PCE values of 6.2% (similar to 20% increase), which is notably higher than for previously reported ETL materials. Advanced scanning probe microscopy techniques were used to elucidate the efficiency enhancing mechanism. | Keywords: | organic photovoltaics; ionic (random co)polythiophenes; conjugated polyelectrolytes; green processing; interface modifications; nanoscale characterization; AFM; bulk heterojunction and bi-layer organic solar cells | Document URI: | http://hdl.handle.net/1942/16069 | ISBN: | 9780819496805 | DOI: | 10.1117/12.2023859 | ISI #: | 000327081500011 | Rights: | © 2013 SPIE | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2014 |
Appears in Collections: | Research publications |
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