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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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Cacialli, F.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (67/67 displayed)
- 2024Perspectives of organic and perovskite‐based spintronics(Advanced Optical Materials 14/2021)citations
- 2022Diarylethenes in Optically Switchable Organic Light-Emitting Diodes: Direct Investigation of the Reversible Charge Carrier Trapping Processcitations
- 2021Diarylethenes in Optically Switchable Organic Light-Emitting Diodes: Direct Investigation of the Reversible Charge Carrier Trapping Process
- 2021Perspectives of organic and perovskite‐based spintronicscitations
- 2021Non-toxic near-infrared (NIR) LEDs
- 2020Lanthanide-Induced Photoluminescence in Lead-Free Cs2AgBiBr6Bulk Perovskite: Insights from Optical and Theoretical Investigationscitations
- 2020Lanthanide Induced Photoluminescence in Lead-Free Cs₂AgBiBr₆ Bulk Perovskite: Insights From Optical and Theoretical Investigations
- 2019Perovskite solar cell resilience to fast neutrons
- 2017Synthesis and Exciton Dynamics of Donor-Orthogonal Acceptor Conjugated Polymers: Reducing the Singlet-Triplet Energy Gapcitations
- 2016Neutron polarisation analysis of Polymer: Fullerene blends for organic photovoltaics
- 2016Tuning Intrachain versus Interchain Photophysics via Control of the Threading Ratio of Conjugated Polyrotaxanes.citations
- 2015Synergic Integration of Conjugated Luminescent Polymers and Three-Dimensional Silicon Microstructures for the Effective Synthesis of Photoluminescent Light Source Arrays
- 2014PHOTOLUMINESCENT LIGHT SOURCE ARRAYS BY SINERGIC INTEGRATION OF CONJUGATED LUMINESCENT POLYMERS AND THREE-DIMENSIONAL SILICON MICROSTRUCTURES
- 2011Threaded molecular wires as building blocks for advanced polymer blends: WPLEDs, ultra-broadband optical amplifiers, multi color lasers
- 2008CONTROLLED PHASE SEPARATION IN CONJUGATED POLYMER BLENDS INDUCED BY THERMOLITHOGRAPHY
- 2008Control of rapid formation of interchain excited states in sugar-threaded supramolecular wirescitations
- 2008Tuning intrachain vs. interchain photophysics via control of the threading ratio of conjugated polyrotaxanescitations
- 2007Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences: Prefacecitations
- 2007Control of luminescence in conjugated polymers through control of chain microstructurecitations
- 2006Local Probing of Photocurrent and Photoluminescence in a Phase-Separated Conjugated-Polymer Blend by Means of Near-Field Excitationcitations
- 2005Supramolecular complexes of conjugated polyelectrolytes with poly(ethylene oxide): Multifunctional luminescent semiconductors exhibiting electronic and ionic transportcitations
- 2005Suppression of Green Emission in a New Class of Blue-Emitting Polyfluorene Copolymers with Twisted Biphenyl Moeitiescitations
- 2005Suppression of green emission in a new class of blue-emitting polyfluorene copolymers with twisted biphenyl moietiescitations
- 2003Electronic line-up in light-emitting diodes with alkali-halide/metal cathodescitations
- 2003Surface conditioning of indium-tin oxide anodes for organic light-emitting diodescitations
- 2003Synthesis and luminescence properties of three novel polyfluorene copolymerscitations
- 2002Cyclodextrin-threaded conjugated polyrotaxanes as insulated molecular wires with reduced interstrand interactionscitations
- 2002Cathodes incorporating thin fluoride layers for efficient injection in blue polymer light-emitting diodescitations
- 2002Design of luminescent polymers for leds
- 2002Improved efficiency of light-emitting diodes based on polyfluorene blends upon insertion of a poly(p-phenylene vinylene) electron-confinement layercitations
- 2002Synthesis and characterisation of poly(distyrylbenzene-block-hexa(ethylene oxide)) and its fluorinated analogue - Two new block copolymers and their application in electroluminescent devicescitations
- 2002A new family of polyfluorene copolymers for light emitting devicescitations
- 2001New routes to monomers and polymers for LEDscitations
- 2001Alteration of the photo and electroluminescent properties of poly(p-phenylene vinylene) upon addition of indium chloridecitations
- 2001Efficient electroluminescent poly(p-phenylene vinylene) copolymers for application in LEDscitations
- 2001Light-emitting electrochemical cells based on poly(p-phenylene vinylene) copolymers with ion-transporting side groupscitations
- 2001De-mixing of polyfluorene-based blends by contact with acetone: Electro- and photo-luminescence probes
- 2001Efficient electron injection in blue-emitting polymer light-emitting diodes with LiF/Ca/Al cathodescitations
- 2001Light-emitting devices based on a poly(p-phenylenevinylene) statistical copolymer with oligo(ethylene oxide) side groupscitations
- 2001Near-infrared electroluminescence of polymer light-emitting diodes doped with a lissamine-sensitized Nd<sup>3+</sup> complexcitations
- 2001Luminescence properties of a PPV-based statistical copolymer with glyme-like side groupscitations
- 2001The influence of LiF thickness on the built-in potential of blue polymer light-emitting diodes with LiF/Al cathodescitations
- 2001Poly(distyrylbenzene-block-sexi(ethylene oxide)), a highly luminescent processable derivative of PPVcitations
- 2001Versatile synthesis of various conjugated aromatic homo- and copolymerscitations
- 2001Injecting inter-layers and the built-in potential of blue polymer light-emitting diodes
- 2001Ultraviolet-visible near-field microscopy of phase-separated blends of polyfluorene-based conjugated semiconductorscitations
- 2001Synthesis of new building blocks for light emitting polymers
- 2001Förster energy transfer and control of the luminescence in blends of an orange-emitting poly(p-phenylenevinylene) and a red-emitting tetraphenylporphyrincitations
- 2001Optical and morphological investigations of non-homogeneity in polyfluorene blendscitations
- 2000Effect of poly(3,4-ethylene dioxythiophene) on the built-in field in polymer light-emitting diodes probed by electroabsorption spectroscopycitations
- 2000Surface wetting properties of treated indium tin oxide anodes for polymer light-emitting diodescitations
- 2000Improved electroluminescence lifetime and efficiency of polymer light-emitting diodes with plasma-treated indium tin oxide anodes
- 2000Molecular-scale interface engineering for polymer light-emitting diodescitations
- 2000Tuning the red emission of a soluble poly(p-phenylene vinylene) upon grafting of porphyrin side groupscitations
- 2000Efficient blue-green light emitting poly(1,4-phenylene vinylene) copolymerscitations
- 2000Role of indium chloride on the luminescence properties of PPVcitations
- 2000The copolymer route to new luminescent materials for LEDs
- 2000Synthesis of porphyrin-PPV copolymers for application in LEDscitations
- 2000Photo and electroluminescent properties of a porphyrin-poly(p-phenylene vinylene) derivative
- 2000Kelvin probe and ultraviolet photoemission measurements of indium tin oxide work function: a comparisoncitations
- 2000Blue light-emitting diodes from a meta-linked 2,3 substituted alkoxy poly(p-phenylenevinylene)citations
- 2000LiF/Al cathodes and the effect of LiF thickness on the device characteristics and built-in potential of polymer light-emitting diodescitations
- 2000Environmental aging of poly(p-phenylenevinylene) based light-emitting diodescitations
- 2000Versatile syntheses of various homo- and copolymers of poly(1,4-arylene vinylene)s
- 2000Characterisation of the physico-chemical properties of surface-treated indium tin oxide anodes for organic light-emitting diodes
- 2000Luminescence properties of PPV-based copolymers with crown ether substituentscitations
- 2000Surface and bulk phenomena in conjugated polymers devicescitations
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article
Local Probing of Photocurrent and Photoluminescence in a Phase-Separated Conjugated-Polymer Blend by Means of Near-Field Excitation
Abstract
In this paper scanning near-field microscopy is used to characterize polymer blends for photovoltaic applications, and fluorescence imaging and photoconductivity are combined to elucidate the spatial distribution and relative efficiency of current generation and photoluminescence in different domains of compositionally heterogeneous films. Focus is placed oil a binary system consisting of poly [(9,9-dioctylfluorene) -alt-benzothiadiazole] (F8BT) and poly[(9,9-dioctylfluorene)-alt-(bis(NN-(4-butylphenyl))-bis(N,N'-phenyl- 1,4-phenylenediamine))] (PFB), spun from xylene solutions, so as to obtain phase separation on micrometer and nanometer length scales. Protruding regions with diameters of about 5 mu m in the topography image coincide with regions of high photocurrent (PC) and luminescence; these regions are identified as being F8BT rich. A general method to estimate the photoluminescence efficiency in the different domains of phase-separated blends is proposed. As expected, lack of enhancement of the PC signal at the boundaries between protruding and lower-lying phases indicate that these microscale boundaries play a small role in the charge generation by exciton splitting. This is consistent with the domains compositional inhomogeneity, and thus with finer phase separation within the domains. We also provide all analysis of the extent to which the metallized probe perturbs the near-field photocurrent signal by integrating Poisson's equation. Finally, by using a Bethe-Bouwkamp, model, the energy absorbed by the polymer film in the different regions is estimated.