Investigation of the optical properties of polyfluorene/ZnO nanocomposites
| Autor: | Sheng-Hsiung Yang, Thien-Phap Nguyen, J.P. Zou, Y. Dan, C. Ton –That, P. Le Rendu, Ishaq Musa |
|---|---|
| Přispěvatelé: | Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN) |
| Rok vydání: | 2011 |
| Předmět: |
Photoluminescence
Materials science Polymer nanocomposite Nanoparticle 02 engineering and technology Electroluminescence 010402 general chemistry 7. Clean energy 01 natural sciences Polyfluorene chemistry.chemical_compound Materials Chemistry Applied Physics chemistry.chemical_classification Polymer composites Nanocomposite Optical properties business.industry Metals and Alloys Surfaces and Interfaces Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering chemistry ZnO [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Optoelectronics 0210 nano-technology Luminescence business |
| Zdroj: | Thin Solid Films Thin Solid Films, Elsevier, 2011, 519 (12), pp.3997. ⟨10.1016/j.tsf.2011.01.205⟩ |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2011.01.205 |
| Popis: | article i nfo Available online 22 January 2011 Polyfluorene (PF) and its derivatives are very promising candidates for organic light emitting diodes (OLEDs) in lighting applications because of their high photoluminescence and electroluminescence efficiencies. Recent investigations of potential materials for OLEDs have shown that introducing n-type inorganic nanoparticles into conjugated polymers is efficient to produce stable and high performance devices. In this study, composite thin films made by incorporation of zinc oxide (ZnO) nanoparticles into a PF derivative have been prepared and their optical properties have been investigated. The prepared thin films were stored in different media (in air, in vacuum, in the dark or exposed to light) in order to study environmental influences on the material stability. Analysis of spectral data obtained from infrared (IR), Raman, UV-vis, and photoluminescence (PL) measurements shows a large enhancement in luminescence for polymer nanocomposites while using high nanoparticle concentrations (within a limit of 10% ZnO). Time-resolved PL performed on those nanocomposite films corroborated the above result: it indicated that the light-emission enhancement can be explained by efficient energy transfer from nanoparticles to the polymer chains and increase of the chain separation distance. In addition, the nanocomposites were found to be more stable than pristine polymer films whatever the storage conditions were used. It was confirmed by IR analysis that incorporation of nanoparticles into polymers prohibited the formation of fluorenonyl groups in PF chains, which was identified as the main cause of the degradation of the polymer under photo-oxidation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect