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Título: | Conjugated polymer nanoparticle-graphene oxide charge-transfer complexes |
Autor: | Istif, Emin CSIC ORCID; Hernández-Ferrer, Javier CSIC ORCID; Urriolabeitia, Esteban P. CSIC ORCID; Stergiou, Anastasios; Tagmatarchis, Nikos; Fratta, Giuseppe; Large, Matthew J.; Dalton, Alan B.; Benito, Ana M. CSIC ORCID ; Maser, Wolfgang K. CSIC ORCID | Palabras clave: | Conjugated polymers Nanoparticles Graphene oxide Self-assembly Charge-transfer complexes |
Fecha de publicación: | 17-abr-2018 | Editor: | Wiley-VCH | Citación: | Advanced Functional Materials 28(23): 1707548 (2018) | Resumen: | The game-changing role of graphene oxide (GO) in tuning the excitonic behavior of conjugated polymer nanoparticles is described for the first time. This is demonstrated by using poly(3-hexylthiophene) (P3HT) as a benchmark conjugated polymer and employing an in-situ re-precipitation approach resulting in P3HT nanoparticles (P3HTNPs) with sizes of 50 - 100 nm in intimate contact with GO. During the self-assembly process, GO changes the crystalline packing of P3HT chains in the forming P3HTNPs from H to H/J aggregates exhibiting exciton coupling constants as low as 2 meV, indicating favorable charge separation along the P3HT chains. Concomitantly, π-π interface interactions between the P3HTNPs and GO sheets are established resulting in the creation of P3HTNPs-GO charge-transfer complexes whose energy bandgaps are lowered by up to 0.5 eV. Moreover, their optoelectronic properties, pre-established in the liquid phase, are retained when processed into thin films from the stable aqueous dispersions, thus eliminating the critical dependency on external processing parameters. These results can be transferred to other types of conjugated polymers. Combined with the possibility of employing water based “green” processing technologies, charge-transfer complexes of conjugated polymer nanoparticles and GO open new pathways for the fabrication of improved optoelectronic thin film devices. | Versión del editor: | http://dx.doi.org/10.1002/adfm.201707548 | URI: | http://hdl.handle.net/10261/163859 | DOI: | 10.1002/adfm.201707548 | ISSN: | 1616-301X | Referencias: | Colom, E.; Istif, Emin; González Domínguez, José Miguel; Hernández-Ferrer, Javier; Benito, Ana M.; Maser, Wolfgang K.P3HT aggregation tuned by synergic interaction with different carbon nanostructures. http://hdl.handle.net/10261/227512 Istif, Emin; Hernández-Ferrer, Javier; Urriolabeitia, Esteban P. ; Stergiou, Anastasios; Tagmatarchis, Nikos; Fratta, Giuseppe; Large, Matthew J.; Dalton, Alan B.; Benito, Ana M. ; Maser, Wolfgang K. Conjugated polymer nanoparticle-graphene oxide charge-transfer complexes. http://hdl.handle.net/10261/187497 Hernández-Ferrer, Javier; Istif, Emin; Ansón Casaos, Alejandro; Santidrián, Ana; Benito, Ana M.; Maser, Wolfgang K. Assessment of charge transfer phenomena in nanostructured composite materials using photoelectrochemical methods. http://hdl.handle.net/10261/227192 |
Aparece en las colecciones: | (ICB) Artículos (ISQCH) Artículos |
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AdvFunctMater_Postscript-4.pdf | Accepted version | 9,1 MB | Adobe PDF | Visualizar/Abrir |
AdvFunctMater_Submitted.pdf | Submitted version | 8,97 MB | Adobe PDF | Visualizar/Abrir |
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