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Author (up) Nam, M.; Park, Y.; Lee, C.; Kim, G.; Larrain, F.A.; Fuente-Hernandez, C.; Ko, D.H.; Kippelen, B.
Title Single-layer organic photovoltaics fabricated via solution-based electrical doping of ternary bulk heterojunction films Type
Year 2023 Publication Chemical Engineering Journal Abbreviated Journal Chem. Eng. J.
Volume 466 Issue Pages 143340
Keywords Organic photovoltaics; Single -layer geometry; Electrical doping; Phosphomolybdic acid; Ternary bulk heterojunction; Indoor energy harvesting
Abstract The commercial viability of organic photovoltaics (OPVs) can be improved by simplifying their device geometry and easing fabrication complexity. Here, we demonstrate that solution-based p-type electrical doping of ternary bulk heterojunction (BHJ) films, which comprise 2 donor polymers and 1 fullerene acceptor (2D:1A), enables the realization of efficient single-layer OPVs. Systematic and detailed investigations of the optoelectronic charac-teristics of films with varying donor ratios, and their photovoltaic performance, demonstrate p-type electrical doping via post-process immersion into a 12-molybdophosphoric acid hydrate (PMA) solution, resulting in a reduced trap density and charge recombination without significantly changing the BHJ morphology. Further-more, PMA doping of films comprising optimized ternary blend compositions and polyethylenimine enables the demonstration of single-layer OPVs with economic top electrode metals and a high level of performance under outdoor and indoor illumination conditions. These PMA-doped 2D:1A BHJ films are an attractive platform to reduce the efficiency-cost gap and accelerate the commercialization of OPVs for emerging applications.
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ISSN 1385-8947 ISBN Medium
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Notes WOS:001007214500001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1823
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