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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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Wen, Xiaoming
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Publications (7/7 displayed)
- 2024Activated charcoal-mediated non-contact carbothermal reduction of TiO2 for controlled synthesis of Magnéli phase titanium suboxidescitations
- 2017Spatial distribution of lead iodide and local passivation on organo-lead halide perovskitecitations
- 2017Inverted Hysteresis in CH3NH3PbI3 Solar Cellscitations
- 2016Extended hot carrier lifetimes observed in bulk In0.265±0.02Ga0.735N under high-density photoexcitationcitations
- 2015Effect of blend composition on binary organic solar cells using a low band gap polymercitations
- 2009Thermal quenching of photoluminescence in ZnO/ZnMgO multiple quantum wells following oxygen implantation and rapid thermal annealingcitations
- 2007Temperature dependent photoluminescence in oxygen ion implanted and rapid thermally annealed ZnOZnMgO multiple quantum wellscitations
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article
Effect of blend composition on binary organic solar cells using a low band gap polymer
Abstract
<p>This report investigates the influence of the solution blend composition of binary bulk heterojunction organic solar cells composed of poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b′]dithiophene-2,6-diyl]] (PCPDTBT) and [6,6]-phenyl C71 butyric acid methyl ester (PC<sub>71</sub>BM). The blend polymer: fullerene composition was varied from 1:1 (50 wt% PC<sub>71</sub>BM) to 2:9 (82 wt% PC<sub>71</sub>BM). Increasing the amount of polymer in the blend results in the greatest overall absorption, as the donor material PCPDTBT is the main contributor to absorption. However, high polymer content leads to poor photovoltaic performance. For this material combination, the optimum blend polymer: fullerene composition was found to be 2:7. Increasing the fullerene content in the blend led to a significant improvement in the internal quantum efficiency of devices. This was correlated with an increase of the electron mobility, as the fullerene content was increased. Improved electron transport, leading to more balanced transport between electrons and holes, significantly improved the short circuit current density (J<sub>sc</sub>) and fill factor (FF).</p>