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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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Turnbull, Graham Alexander
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskitecitations
- 2023Fluorescence lifetime imaging for explosive detectioncitations
- 2021Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communicationscitations
- 2020Correlating Phase Behavior with Photophysical Properties in Mixed‐Cation Mixed‐Halide Perovskite Thin Filmscitations
- 2019Low threshold polariton lasing from a solution-processed organic semiconductor in a planar microcavitycitations
- 2018Improved organic semiconductor explosive sensors for application on minefields
- 2017An investigation of the energy levels within a common perovskite solar cell device and a comparison of DC/AC surface photovoltage spectroscopy Kelvin Probe measurements of different MAPBI3 perovskite solar cell device structurescitations
- 2016Nanoimprinted distributed feedback lasers of solution processed hybrid perovskitescitations
- 2016Self-trapping and excited state absorption in fluorene homo-polymer and copolymers with benzothiadiazole and tri-phenylaminecitations
- 2015Microstructured organic semiconductors
- 2015Solvent immersion nanoimprint lithography of fluorescent conjugated polymerscitations
- 2013LED pumped polymer laser sensor for explosivescitations
- 2009The Development of Luminescent Concentrators for Pumping Organic Semiconductor Laserscitations
- 2005Holographic recording of sub-micron period gratings and photonic crystals in the photoresist SU8citations
- 2003Polymer laser fabricated by a simple micromolding processcitations
- 2002Optical properties of a light-emitting polymer directly patterned by soft lithographycitations
- 2002Index and relief gratings in polymer films for organic distributed feedback laserscitations
- 2002Fabrication of refractive index and relief gratings in polymer films for DFB lasers
- 2002Emission characteristics and photonic band structure of microstructured polymer lasers
- 2002Photonic band structure and emission characteristics of a metal-backed polymeric distributed feedback lasercitations
- 2000Tuneability of amplified spontaneous emission through control of the waveguide-mode structure in 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