Dynamics and Coherence of Photoexcited States in Polyfluorene Films with Ordered Chain Phases
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Título: | Dynamics and Coherence of Photoexcited States in Polyfluorene Films with Ordered Chain Phases |
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Autor/es: | Quintero-Jaime, Andrés Felipe | Hafed-Khatiri, Salma | Huerta Arráez, Francisco | Quijada Tomás, César | Montilla, Francisco |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Electrofluorochromism | Exciton diffusion | β-phase structure | Huang-Rhys factor | Exciton coherence |
Fecha de publicación: | 22-jul-2022 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Journal of Materials Chemistry C. 2022, 10: 11801-11809. https://doi.org/10.1039/D2TC02770D |
Resumen: | Understanding the optical and electronic excitations in conjugated polymers, their delocalization, and dynamics is of paramount importance for improving the performance of optoelectronic devices. The structure of the conjugated polymer in solid state, the presence of ordered domains, and conformational subunits strongly affect exciton and polaron interactions. The effect of the crystalline structure of polyfluorene films on exciton dynamics was studied by a combination of electrochemical and spectroscopic methods. Optoelectronic alterations caused by the p-doping process strongly suggest that the electrochemical charge injection occurs mainly in the more ordered β-phase. Evidence for the presence of either α- or β-phases is supported by the different behavior of the fluorescence quenching at increasing doping levels (the quenching elements appear more homogeneously distributed in the α-PFO phase). Estimated singlet exciton coherence lengths indicate that it delocalizes over 20 repeat units in the -PFO phase, but it extends only over 14 units for β-PFO. |
Patrocinador/es: | The authors would like to thank Spanish Ministerio de Ciencia e Innovación (projects PID2019-105923RB-I00, PDC2021-120884-I00, European Union NextGenerationEU PRTR-C17.I1) and Generalitat Valenciana (project GVA-THINKINAZUL/2021/015 and PROMETEO/2018/087) for financial support. |
URI: | http://hdl.handle.net/10045/125920 |
ISSN: | 2050-7526 (Print) | 2050-7534 (Online) |
DOI: | 10.1039/D2TC02770D |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © Royal Society of Chemistry 2022 |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1039/D2TC02770D |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Quintero-Jaime_etal_2022_JMaterChemC_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,38 MB | Adobe PDF | Abrir Vista previa |
Quintero-Jaime_etal_2022_JMaterChemC_final.pdf | Versión final (acceso restringido) | 1,03 MB | Adobe PDF | Abrir Solicitar una copia |
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