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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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Wright, Matthew
Teesside University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Assessing isometric hip strength in young professional soccer players: Does hip-flexion angle matter?
- 2023Towards a graphene transparent conducting electrode for perovskite/silicon tandem solar cellscitations
- 2023SiNx and AlOx nanolayers in hole selective passivating contacts for high efficiency silicon solar cellscitations
- 2023Design Considerations for the Bottom Cell in Perovskite / Silicon Tandems: An Industrial Perspectivecitations
- 2022Fitness testing in soccer revisitedcitations
- 2020Re‐evaluation of sodium aluminium silicate (E 554) and potassium aluminium silicate (E 555) as food additivescitations
- 2017Controlled Ostwald ripening mediated grain growth for smooth perovskite morphology and enhanced device performancecitations
- 2016Analysis of burn-in photo degradation in low bandgap polymer PTB7 using photothermal deflection spectroscopycitations
- 2016Effect of blend composition on ternary blend organic solar cells using a low band gap polymercitations
- 2015Effect of blend composition on binary organic solar cells using a low band gap polymercitations
- 2014Enhancement of ternary blend organic solar cell efficiency using PTB7 as a sensitizercitations
Places of action
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article
Analysis of burn-in photo degradation in low bandgap polymer PTB7 using photothermal deflection spectroscopy
Abstract
<p>The efficiency of organic photovoltaic devices continues to increase; however, their limited stability is currently a barrier to the commercial prospects of the technology. Burn-in photo degradation, caused by continuous illumination under a light source, can cause a significant reduction in device performance. Our aim was to investigate this degradation pathway for the high-efficiency polymer PTB7, which was compared to the well-studied P3HT:PC<sub>71</sub>BM material system. In this study, we compared the burn-in aging profile for organic solar cells containing either P3HT or PTB7 as the donor polymer. This showed that PTB7:PC<sub>71</sub>BM solar cells exhibit a severe initial reduction in performance, due mainly to reduced short circuit current density (J<sub>sc</sub>), during the 5 hour test period. P3HT:PC<sub>71</sub>BM cells were relatively stable during this test. Photothermal deflection spectroscopy (PDS), which provides sensitive measurement of sub bandgap absorption, was employed to discover the underlying mechanism causing this discrepancy. In PTB7-based devices, a significant increase in sub bandgap absorption was observed after illumination, which was attributed to the formation of sub bandgap trap states. This mechanism was identified as a contributing factor to the severe burn-in for PTB7-based organic solar cells. No such increase was observed for P3HT:PC<sub>71</sub>BM films.</p>