HOLMES, A.; LAVAL, Hugo; SCHMUTZ, Marc; BLANC, S.; ALLOUCHE, Joachim; WATTS, B.; WANTZ, Guillaume; HOLMES, N.P.; HIRAKAWA, K.; DENIAU-LEJEUNE, Elise; CHAMBON, S.; LARTIGAU-DAGRON, Christine; BOUSQUET, A.

doi:10.1016/j.mtchem.2022.101229

LAVAL, Hugo
Laboratoire de l'intégration, du matériau au système [IMS]

SCHMUTZ, Marc

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Article de revue

Ce document a été publié dans

Materials Today Chemistry. 2022-12, vol. 26, p. 101229

Résumé en anglais

Nanoparticles (NPs) of donor–acceptor organic semiconductors are produced by a one-step nanoprecipitation with Janus morphology. Electron donor P3HT was blended with electron acceptor PC61BM in tetrahydrofuran and then precipitated in water, first with surfactant and second without surfactant. Cryogenic transmission electron microscopy reveals an internal Janus structure at high magnification, for NPs which have, in the past, been reported to have a molecularly intermixed morphology. Synchrotron-based scanning transmission X-ray microscopy confirmed the segregation of the organic semiconductors and photoluminescence experiments showed an efficient electron transfer from P3HT to PC61BM. Organic field effect transistors were fabricated with these Janus NPs and showed that the positive charges can be efficiently transported through thin films. This behavior proves that the NPs possess an electron-accepting face (the PC61BM face) able to transport electrons and a hole-accepting face (the P3HT face) for the conduction of holes. Finally, the deposition of silver via the photoreduction of a silver salt (AgNO3(aq)) was demonstrated, as a proof of concept. These experiments show the potential of the Janus NPs for photovoltaics but also photocatalytic reactions in which reduction and oxidation reactions can occur at opposite sides of the nanoreactor (the individual Janus NPs).< Réduire

Mots clés en anglais

π-conjugated materials

Janus nanoparticles

Photocatalysis

Photovoltaics

URI

https://oskar-bordeaux.fr/handle/20.500.12278/172100

DOI

http://dx.doi.org/10.1016/j.mtchem.2022.101229

Project ANR

E2S - ANR-16-IDEX-0002
Encres aqueuses colloïdales de semi-conducteurs organiques pour le photovoltaïque

Unités de recherche

IMS : Laboratoire de l'Intégration du Matériau au Système - UMR 5218

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Janus organic semiconductor nanoparticles prepared by simple nanoprecipitation