| People | Locations | Statistics |
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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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Von Hauff, Elizabeth
Fraunhofer Society
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Volumetric 3D-Printed Piezoelectric Polymer Filmscitations
- 2021Correlating Ultrafast Dynamics, Liquid Crystalline Phases, and Ambipolar Transport in Fluorinated Benzothiadiazole Dyescitations
- 2021Correlating Ultrafast Dynamics, Liquid Crystalline Phases, and Ambipolar Transport in Fluorinated Benzothiadiazole Dyescitations
- 2019Air-stable and oriented mixed lead halide perovskite (FA/MA) by the one-step deposition method using Zinc Iodide and an Alkylammonium additivecitations
- 2019Relating Chain Conformation to the Density of States and Charge Transport in Conjugated Polymers:The Role of the β -phase in Poly(9,9-dioctylfluorene)citations
- 2019Air-Stable and Oriented Mixed Lead Halide Perovskite (FA/MA) by the One-Step Deposition Method Using Zinc Iodide and an Alkylammonium Additivecitations
- 2019Relating Chain Conformation to the Density of States and Charge Transport in Conjugated Polymers: The Role of the β -phase in Poly(9,9-dioctylfluorene)citations
- 2019Relating Chain Conformation to the Density of States and Charge Transport in Conjugated Polymerscitations
- 2018Extraordinary Interfacial Stitching between Single All-Inorganic Perovskite Nanocrystalscitations
- 2018Extraordinary Interfacial Stitching between Single All-Inorganic Perovskite Nanocrystalscitations
- 2016High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cellscitations
- 2016High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cellscitations
- 2015Imaging of morphological changes and phase segregation in doped polymeric semiconductorscitations
- 2015Imaging of morphological changes and phase segregation in doped polymeric semiconductorscitations
- 2013Silica Nanoparticles for Enhanced Carrier Transport in Polymer-Based Short Channel Transistorscitations
- 2013Silica Nanoparticles for Enhanced Carrier Transport in Polymer-Based Short Channel Transistorscitations
- 2013Thiophene-based copolymers synthesized by electropolymerization for application as hole transport layer in organic solar cellscitations
- 2013Interpreting the density of states extracted from organic solar cells using transient photocurrent measurementscitations
- 2012The Effect of Ageing on Exciton Dynamics, Charge Separation, and Recombination in P3HT/PCBM Photovoltaic Blendscitations
- 2012The Effect of Ageing on Exciton Dynamics, Charge Separation, and Recombination in P3HT/PCBM Photovoltaic Blendscitations
- 2012Influence of different copolymer sequences in low band gap polymers on their performance in organic solar cellscitations
- 2012ITO-free inverted polymer/fullerene solar cells: Interface effects and comparison of different semi-transparent front contactscitations
- 2012Influence of molecular weight on the short-channel effect in polymer-based field-effect transistorscitations
- 2011The Role of Molecular Structure and Conformation in Polymer Electronicscitations
- 2009Electrochemical Synthesis of Polypyrrole Layers Doped with Glutamic Ionscitations
- 2008Binding and release of glutamate from overoxidized polypyrrole via an applied potential for application as a molecular switchcitations
- 2005Diphenylmethanofullerenes: New and efficient acceptors in bulk-heterojunction solar cellscitations
Places of action
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article
The Effect of Ageing on Exciton Dynamics, Charge Separation, and Recombination in P3HT/PCBM Photovoltaic Blends
Abstract
A study of how light-induced degradation influences the fundamental photophysical processes in the active layer of poly(3-hexylthiophene)/[6,6]-phenyl C61-butyric acid methyl ester (P3HT/PCBM) solar cells is presented. Non-encapsulated samples are systematically aged by exposure to AM 1.5 illumination in the presence of dry air for different periods of time. The extent of degradation is quantified by the relative loss in the absorption maximum of the P3HT, which is varied in the range 0% to 20%. For degraded samples an increasing loss in the number of excitons within the P3HT domains is observed with longer ageing periods. This loss occurs rapidly, within the first 15 ps after photoexcitation. A more pronounced decrease in the population of polarons than excitons is observed, which also occurs on a timescale of a few picoseconds. These observations, complemented by a quantitative analysis of the polaron and exciton population dynamics, unravel two primary loss mechanisms for the performances of aged P3HT/PCBM solar cells. One is an initial ultrafast decrease in the polaron generation, apparently not related to the exciton diffusion to the polymer/fullerene interface; the second, less significant, is a loss in the exciton population within the photoexcited P3HT domains. The steady-state photoinduced absorption spectra of degraded samples exhibits the appearance of a signal ascribed to triplet excitons, which is absent for non-degraded samples. This latter observation is interpreted considering the formation of degraded sites where intersystem crossing and triplet exciton formation is more effective. The photovoltaic characteristics of same blends are also studied and discussed by comparing the decrease in the overall power conversion efficiency of solar cells.<br/>