Journal
ADVANCED ENERGY MATERIALS
Volume 13, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202202820
Keywords
electrical doping; nanoparticles; nanoprecipitation; non-fullerene acceptors; organic solar cells
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High-performance organic solar cells are produced from eco-friendly semiconductor dispersions using reversible electrostatic stabilization, eliminating the need for surfactants. Iodine is added to promote polymer oxidation and enhance the colloidal stability of the dispersions. The resulting polymer:non-fullerene solar cells exhibit power conversion efficiencies of up to 10.6% after thin-film deposition and thermal evaporation of the iodine.
High-performance organic solar cells are deposited from eco-friendly semiconductor dispersions by applying reversible electrostatic stabilization while omitting the need for stabilizing surfactants. The addition of iodine fosters the oxidation (p-doping) of the light-harvesting polymer, effectively promoting the electrostatic repulsion of the nanoparticles and hence the colloidal stability of the respective dispersions. The oxidation of polymers with iodine is reversible: after thin-film deposition and after thermal evaporation of the iodine, the corresponding polymer:non-fullerene solar cells yield power conversion efficiencies of up to 10.6%.
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