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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Coehoorn, Reinder
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Topics
Publications (5/5 displayed)
- 2020On the origin of dark current in organic photodiodescitations
- 2011Predictive modeling of the current density and radiative recombination in blue polymer-based light-emitting diodescitations
- 2010Electron transport in the organic small-molecule material BAlq - the role of correlated disorder and trapscitations
- 2009Electron transport in polyfluorene-based sandwich-type devices: Quantitative analysis of the effects of disorder and electron trapscitations
- 2008Hole transport in polyfluorene-based sandwich-type devices : quantitative analysis of the role of energetic disordercitations
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article
Electron transport in the organic small-molecule material BAlq - the role of correlated disorder and traps
Abstract
An analysis is presented of the layer-thickness dependent and temperature-dependent current density in sandwich-type electron-only devices based on the amorphous small-molecule organic semiconductor BAlq, which is frequently used in organic light-emitting diodes. The electron transport can be consistently described by assuming a density of states (DOS) which is a superposition of a Gaussian DOS and an exponential trap DOS, with 85 and 100 meV widths, respectively, using a mobility model which includes the carrier density dependence of the mobility in the Gaussian DOS and assuming either random or spatially correlated site energies. From a comparison of the density of hopping sites obtained from both models and the density of molecules as obtained from chemical analysis, evidence for the presence of correlated disorder is found.