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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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Demir, Fatma
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2012Analysing organic solar cell blends at thousands of degrees per second
- 2012Crystallization Kinetics and Morphology Relations on Thermally Annealed Bulk Heterojunction Solar Cell Blends Studied by Rapid Heat Cool Calorimetry (RHC)
- 2011Thermal annealing of P3HT: PCBM blends for photovoltaic studies
- 2011Thermal Annealing of P3HT: PCBM Organic Photovoltaic Blends
- 2011Relations between phase diagram, kinetics of thermal annealing process, and morphological stability in polymer:fullerene blends for bulk heterojunction solar cells
- 2011Isothermal crystallisation study of P3HT:PCBM blends as used in bulk heterojunction solar cells based on fast scanning calorimetry techniques
- 2010Isothermal crystallization kinetics of P3HT:PCBM blends by means of RHC
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document
Relations between phase diagram, kinetics of thermal annealing process, and morphological stability in polymer:fullerene blends for bulk heterojunction solar cells
Abstract
For the efficiency of bulk heterojunction solar cells based on blends of conjugated polymers and fullerenes, the formation of nanostructured morphology is crucial. As the diffusion distance of the excitons, the hole-electron pairs generated upon photon absorption is limited to a few nanometer, at least one of the phase dimensions should not exceed 10 nm. To permit an efficient charge transport of the charges generated, a co-continuous phase morphology is needed. <br/>A thorough study of the thermal transitions and isothermal annealing of polymer:fullerene blends revealed several key aspects for the usage of these materials for solar cell applications. The glass transition of the polymer:fullerene blends is crucial for the long-term stability of the required nanostructured morphology needed for optimal performance.<br/>The temperature dependence of the crystallization rate can be used to control the thermal annealing on the one hand, but might also prove useful for predicting the long-term stability at application temperature from accelerated ageing tests at more elevated temperatures.