Absorption cross-sections of hole polarons in glassy and β-phase polyfluorene
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Título: | Absorption cross-sections of hole polarons in glassy and β-phase polyfluorene |
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Autor/es: | Montilla, Francisco | Ruseckas, Arvydas | Samuel, Ifor D.W. |
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: | Absorption cross-sections | Hole polarons | Glassy | β-phase polyfluorene |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 14-oct-2013 |
Editor: | Elsevier |
Cita bibliográfica: | Chemical Physics Letters. 2013, 585: 133-137. doi:10.1016/j.cplett.2013.08.098 |
Resumen: | Absorption induced by electrochemically injected holes is studied in poly-9,9-dioctylfluorene (PFO) films. Injected charges form positive polarons which are delocalised over four fluorene units in the glassy phase and about seven fluorene units in its β-phase. Polaron absorption cross-sections at the 640 nm peak are similar to the published values of chemically reduced oligofluorenes in solution. The absorption cross-section of polaron in the β-phase at 470 nm is about eight times smaller than the stimulated emission cross-section derived from published data. This indicates that β-phase-rich PFO is an attractive candidate for a light-emitting layer in double-heterostructure organic laser diodes. |
Patrocinador/es: | F. Montilla is grateful for financial support provided by Ministerio de Economía y Competitividad (Ramón y Cajal RYC1463/06 and José Castillejo JC2009-00227 Programs). We are also grateful to the Engineering and Physical Sciences Research Council for financial support. |
URI: | http://hdl.handle.net/10045/38687 |
ISSN: | 0009-2614 (Print) | 1873-4448 (Online) |
DOI: | 10.1016/j.cplett.2013.08.098 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2013 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.cplett.2013.08.098 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
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