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Organic semiconductor core-shell nanoparticles designed through successive solvent displacements

Abstract : This study reports for the first time the elaboration of core-shell organic nanoparticles through successive solvent displacements. The concept has been applied to generate donor-acceptor nanoparticles with the commonly used organic semiconductors P3HT and PCBM. The strategy is based on the sequential nanoprecipitation of P3HT and PCBM. Starting from a P3HT:PCBM solution in THF, the first solvent displacement with DMSO triggers the formation of the P3HT core while the second displacement with water generates the PCBM shell. The core-shell morphology is evidenced by both DLS and TEM. Efficient quenching of the P3HT photoluminescence is observed after the second solvent displacement procedure, confirming the formation of a well-defined PCBM shell around the P3HT core. Studying the emission of such core-shell nanoparticles leads to an estimation of the diffusion length of photogenerated excitons in P3HT of around [similar]14 nm.
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https://hal.archives-ouvertes.fr/hal-00967444
Contributor : Sylvain Chambon Connect in order to contact the contributor
Submitted on : Friday, March 28, 2014 - 3:41:28 PM
Last modification on : Tuesday, December 7, 2021 - 2:06:02 PM

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Sylvain Chambon, Christophe Schatz, Vivien Sébire, Bertrand Pavageau, Guillaume Wantz, et al.. Organic semiconductor core-shell nanoparticles designed through successive solvent displacements. Materials Horizons, cRoyal Society of Chemistry, 2014, 1 (4), pp.431-438. ⟨10.1039/C4MH00021H⟩. ⟨hal-00967444⟩

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