Electron transport in polyfluorene-based sandwich-type devices: Quantitative analysis of the effects of disorder and electron traps
| Autor: | Sie Vulto, van Slm Siebe Mensfoort, R Reinder Coehoorn, Raj René Janssen, Jgje Joris Billen |
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| Přispěvatelé: | Molecular Materials and Nanosystems, Macromolecular and Organic Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Electron mobility
Materials science Condensed matter physics Gaussian 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Exponential function Polyfluorene chemistry.chemical_compound symbols.namesake Superposition principle chemistry 0103 physical sciences Density of states symbols 010306 general physics 0210 nano-technology Current density |
| Zdroj: | Physical Review B, 80(3):033202, 033202-1/4. American Physical Society Physical Review B |
| ISSN: | 1098-0121 |
| DOI: | 10.1103/physrevb.80.033202 |
| Popis: | Results of a combined experimental and modeling study of electron transport in a blue-emitting polyfluorene-based copolymer in sandwich-type devices are presented. We show how, for wide temperature and layer thickness ranges, an accurate and internally consistent drift-diffusion model description of the voltage-dependent current density can be obtained. We employ an adapted form of the ``extended Gaussian disorder model,'' within which the density of states (DOS) is described as a superposition of a Gaussian DOS and an exponential DOS (``trap states''), characterized by only a small set of physically meaningful parameters. A comparison is made with the hole mobility reported for related polymers. |
| Databáze: | OpenAIRE |
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