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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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Ruseckas, Arvydas
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Chlorine retention enables the indoor light harvesting of triple halide wide bandgap perovskitescitations
- 2020Efficient indoor p-i-n hybrid perovskite solar cells using low temperature solution processed NiO as hole extraction layerscitations
- 2020Low threshold polariton lasing from a solution-processed organic semiconductor in a planar microcavitycitations
- 2019Efficient indoor p-i-n hybrid perovskite solar cells using low temperature solution processed NiO as hole extraction layerscitations
- 2019Low threshold polariton lasing from a solution-processed organic semiconductor in a planar microcavitycitations
- 2019Efficient indoor pin hybrid perovskite solar cells using low temperature solution processed NiO as hole extraction layerscitations
- 2019Improved efficiency of PbS quantum dot sensitized NiO photocathodes with naphthalene diimide electron acceptor bound to the surface of the nanocrystalscitations
- 2019Interface limited hole extraction from methylammonium lead iodide filmscitations
- 2019Interface limited hole extraction from methylammonium lead iodide filmscitations
- 2019Hole delocalization as a driving force for charge pair dissociation in organic photovoltaicscitations
- 2018Improved efficiency of PbS quantum dot sensitized NiO photocathodes with naphthalene diimide electron acceptor bound to the surface of the nanocrystalscitations
- 2017Tuning crystalline ordering by annealing and additives to study its effect on exciton diffusion in a polyalkylthiophene copolymercitations
- 2016Self-trapping and excited state absorption in fluorene homo-polymer and copolymers with benzothiadiazole and tri-phenylaminecitations
- 2015Controlling exciton diffusion and fullerene distribution in photovoltaic blends by side chain modificationcitations
- 2012Nanosecond two-photon absorption and lasing in fluorene-based organic semiconductors
- 2012A Shift from Diffusion Assisted to Energy Transfer Controlled Fluorescence Quenching in Polymer-Fullerene Photovoltaic Blendscitations
- 2009A two-photon pumped polyfluorene lasercitations
- 2009Effects of thermal annealing on the photophysical properties of bisfluorene-cored dendrimer filmscitations
- 2008Thickness Dependence of the Fluorescence Lifetime in Films of Bisfluorene-Cored Dendrimerscitations
- 2008Distance dependence of excitation energy transfer between spacer-separated conjugated polymer filmscitations
Places of action
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article
Self-trapping and excited state absorption in fluorene homo-polymer and copolymers with benzothiadiazole and tri-phenylamine
Abstract
We thank the EPSRC [EP/J009318/1 and EP/J009016/1] for funding. MJP thanks the European Research Council (ERC) for funding under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC Grant No. 258990. ; Excited state absorption (ESA) is studied using time-dependent density functional theory and compared with experiments performed in dilute solutions. The molecules investigated are a fluorene pentamer, polyfluorene F8, the alternating F8 copolymer with benzothiadiazole F8BT, and two blue-emitting random copolymers F8PFB and F8TFB. Calculated and measured spectra show qualitatively comparable results. The ESA cross-section of co-polymers at its maximum is about three times lower than that of F8. The ESA spectra are found to change little upon structural relaxation of the excited state, or change in the order of sub-units in a co-polymer, for all studied molecules. In all these molecules, the strongest ESA transition is found to arise from the same electronic process, exhibiting a reversal of the charge parity. In addition, F8PFB and F8TFB are found to possess almost identical electronic behaviour. ; Peer reviewed