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17 October 2013 Ionic high-performance light harvesting and carrier transporting OPV materials
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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% (~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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Maes, T. Ghoos, J. Kesters, J. Drijkoningen, W. Vanormelingen, O. Malinkiewicz, H. J. Bolink, L. Lutsen, J. Manca, and D. Vanderzande "Ionic high-performance light harvesting and carrier transporting OPV materials", Proc. SPIE 8830, Organic Photovoltaics XIV, 88301A (17 October 2013); https://doi.org/10.1117/12.2023859
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