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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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Stevens, Derek M.
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Publications (3/3 displayed)
- 2009Low band gap poly(thienylene vinylene)/fullerene bulk heterojunction photovoltaic cellscitations
- 2009Enhancement of the morphology and open circuit voltage in bilayer polymer/fullerene solar cellscitations
- 2009High open-circuit voltage photovoltaic cells with a low bandgap copolymer of isothianaphthene, thiophene, and benzothiadiazole unitscitations
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article
Enhancement of the morphology and open circuit voltage in bilayer polymer/fullerene solar cells
Abstract
<p>We describe the influence of thermal annealing on the performance of polymer bilayer solar cell devices of regioregular poly(3-hexylthiophene), regiorandom poly(3-hexylthiophene), or poly(3-hexyl-2,5-thienylene vinylene) (P3HTV), with C <sub>60</sub> as the electron acceptor. In all cases, charge collection improves with heat treatment as the donor/acceptor layers intermix. Open circuit voltage, V <sub>oc</sub>, also improves with annealing temperature, trending consistently with a reduction in the dark forward current. With extreme temperatures, C <sub>60</sub> completely penetrates the polymer film, causing a reduction in V <sub>oc</sub>. This C <sub>60</sub> penetration in annealed devices can be prevented by inclusion of a pentacene electron-blocking layer at the anode. For P3HTV/C <sub>60</sub> solar cells, these treatments lead to peak power conversion efficiencies of 1.19%.</p>