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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
Thickness Dependence of the Fluorescence Lifetime in Films of Bisfluorene-Cored Dendrimers
Abstract
The effect of film thickness on fluorescence lifetime, quantum yield, and exciton diffusivity is studied in first-generation bisfluorene-cored dendrimers with E-stilbenyl and biphenyl-based dendrons. A decrease of the fluorescence lifetime and quantum yield is observed in films thinner than 50 nm spin-coated on fused silica substrates. The radiative decay of the singlet excited-state and singlet exciton diffusion rates are independent of the film thickness within a 20% uncertainty. The fluorescence lifetime of dendrimers dispersed in an inert host is also independent of film thickness. The nonradiative decay rate increases by a factor of 4 in thin films of dendrimers with first-generation E-stilbenyl dendrons. The same effect is observed on different a apphire substrates, and it is much weaker in the dendrimer with first-generation biphenyl dendrons, ass and which allows us to rule out quenching by substrate. The data can be explained by long-range (dipole-dipole) energy transfer to quenching sites concentrated at the surface of thin films. The results contribute to understanding of the thin film photophysics and will help development of light-emitting devices.