Influence of the processing conditions on charge transfer and transport properties in poly(2-methoxy-5-(2′-ethylhexyloxy)1-4-phenylenevinylene):C60 composites for photovoltaics
| Autor: | A. Bouazizi, A. Ltaief, Joel Davenas, Pierre Alcouffe |
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| Přispěvatelé: | Laboratoire de Physique et Chimie des Interfaces [Monastir] (LPCI), Faculté des Sciences de Monastir (FSM), Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux (IMP-LMPB), Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Fullerene 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy chemistry.chemical_compound Buckminsterfullerene Materials Chemistry Electrical measurements Composite material Thin film Sol-gel chemistry.chemical_classification Spin coating Metals and Alloys Surfaces and Interfaces Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials [CHIM.POLY]Chemical Sciences/Polymers chemistry 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Thin Solid Films Thin Solid Films, Elsevier, 2008, 516 (7), pp.1578-1583 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2007.07.191 |
| Popis: | International audience; Polymer-based photovoltaic devices have been elaborated by blending the conjugated polymer, poly(2-methoxy-5-(2'-ethylhexyloxy)1-4-phenylenevinylene) (MEH-PPV) with the buckminsterfullerene, C60. The solvent used has a main influence on the optical and electrical properties of the photoactive layers. This could be attributed to different dispersion abilities of C60 in the polymer layers shown by Atomic Force Microscopy and Scanning Electron Microscopy. Its effect on the transfer and transport properties has been studied. Thin film processing conditions have been modified by the preparation of blends of solutions of the polymer in Tetrahydrofuran and fullerene in Ortho-dichlorobenzene. The resulting spin casted layers show improved morphologies implying better dispersion of the fullerenes and increased short circuit currents. A decrease in the fullerene critical concentration to form percolation paths has been demonstrated. The improvement of the photovoltaic properties of the MEH-PPV/C60 composites has been attributed to the nanosized fullerene domains formed upon phase separation. We used optical spectroscopy to study the charge transfer efficiency and electrical measurements to investigate charge transport properties in MEH-PPV:C60. |
| Databáze: | OpenAIRE |
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