| 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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Bolink, Henk
Universitat de València
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (45/45 displayed)
- 2024Vacuum-Deposited Bifacial Perovskite Solar Cellscitations
- 2024Strategies to improve the mechanical robustness of metal halide perovskite solar cellscitations
- 2024Laminated Polymer-Encapsulated Halide Perovskite Photoconductorscitations
- 2024Fully Vacuum Deposited Perovskite Solar Cells in Substrate Configurationcitations
- 2024Stabilizing Single-Source Evaporated Perovskites with Organic Interlayers for Amplified Spontaneous Emissioncitations
- 2023Chalcohalide Antiperovskite Thin Films with Visible Light Absorption and High Charge-Carrier Mobility Processed by Solvent-Free and Low-Temperature Methodscitations
- 2023Amplified Spontaneous Emission Threshold Dependence on Determination Method in Dye-Doped Polymer and Lead Halide Perovskite Waveguidescitations
- 2023Perovskite/Perovskite Tandem Solar Cells in the Substrate Configuration with Potential for Bifacial Operationcitations
- 2023Polymer-Encapsulated Halide Perovskite Color Converterscitations
- 2023Transparent Light-Emitting Electrochemical Cellscitations
- 2023Semitransparent near-infrared Sn-Pb hybrid perovskite photodetectorscitations
- 2023Highly Luminescent Transparent Cs2AgxNa1−xBiyIn1−yCl6 Perovskite Films Produced by Single-Source Vacuum Depositioncitations
- 2022Advances in solution-processed near-infrared light-emitting diodescitations
- 2022Vacuum-Deposited Microcavity Perovskite Photovoltaic Devicescitations
- 2022Wafer-scale pulsed laser deposition of ITO for solar cells: reduced damage vs. interfacial resistancecitations
- 2022Density of states within the bandgap of perovskite thin films studied using the moving grating techniquecitations
- 2022Amplified spontaneous emission in thin films of quasi-2D BA3MA3Pb5Br16 lead halide perovskitescitations
- 2022Vacuum-Deposited Cesium Tin Iodide Thin Films with Tunable Thermoelectric Propertiescitations
- 2022Amplified Spontaneous Emission Threshold Dependence on Determination Method in Dye-Doped Polymer and Lead Halide Perovskite Waveguidescitations
- 2022Dimensionality Controls Anion Intermixing in Electroluminescent Perovskite Heterojunctionscitations
- 2022Pulsed Laser Deposition of Cs2AgBiBr6: from Mechanochemically Synthesized Powders to Dry, Single-Step Depositioncitations
- 2022Tuning the Optical Absorption of Sn-, Ge-, and Zn-Substituted Cs2AgBiBr6 Double Perovskites: Structural and Electronic Effectscitations
- 2022Perovskite Solar Cells: Stable under Space Conditionscitations
- 2021Efficient vacuum deposited p-i-n and n-i-p perovskite solar cells employing doped charge transport layerscitations
- 2021Efficient Monolithic Perovskite/Perovskite Tandem Solar Cellscitations
- 2021Vacuum Deposited Triple-Cation Mixed-Halide Perovskite Solar Cellscitations
- 2020Room temperature vacuum-deposition of CsPbI2Br perovskite films from multiple-sources and mixed halide precursorscitations
- 2020Single-Source Vacuum Deposition of Mechanosynthesized Inorganic Halide Perovskitescitations
- 2020Preparation and Characterization of Mixed Halide MAPbI3−xClx Perovskite Thin Films by Three‐Source Vacuum Depositioncitations
- 2020Deposition Kinetics and Compositional Control of Vacuum Processed CH3NH3PbI3 Perovskitecitations
- 2020Molecular Passivation of MoO3: Band Alignment and Protection of Charge Transport Layers in Vacuum-Deposited Perovskite Solar Cellscitations
- 2020Making by Grinding: Mechanochemistry Boosts the Development of Halide Perovskites and Other Multinary Metal Halidescitations
- 2020Solvent-Free Synthesis and Thin-Film Deposition of Cesium Copper Halides with Bright Blue Photoluminescencecitations
- 2020Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cellscitations
- 2020Dual-source vacuum deposition of pure and mixed halide 2D perovskites: thin film characterization and processing guidelinescitations
- 2020Dual-source vacuum deposition of pure and mixed halide 2D perovskites: thin film characterization and processing guidelinescitations
- 2020Degradation Mechanisms in Organic Lead Halide Perovskite Light‐Emitting Diodescitations
- 2020Phosphomolybdic acid as an efficient hole injection material in perovskite optoelectronic devicescitations
- 2020High voltage vacuum-processed perovskite solar cells with organic semiconducting interlayerscitations
- 2020Vacuum-Deposited Multication Tin-Lead Perovskite Solar Cellscitations
- 2020Mechanochemical Synthesis of Sn(II) and Sn(IV) Iodide Perovskites and Study of Their Structural, Chemical, Thermal, Optical and Electrical Propertiescitations
- 2019Coating evaporated MAPI thin films with organic molecules: improved stability at high temperature and implementation in high-efficiency solar cellscitations
- 2019Short photoluminescence lifetimes in vacuum-deposited ch3nh3pbI3 perovskite thin films as a result of fast diffusion of photogenerated charge carrierscitations
- 2016Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligandscitations
- 2016Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligandscitations
Places of action
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article
Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligands
Abstract
The structure-property relationship study of a series of cationic Ir(III) complexes in the form of [Ir(C^N)<sub>2</sub>(d<i>t</i>Bubpy)]PF<sub>6</sub> [where dtBubpy = 4,4′-di<i>tert</i>-butyl-2,2′- bipyridine and C^N = cyclometallating ligand bearing an electron-withdrawing group (EWG) at C<sub>4</sub> of the phenyl substituent, i.e. -CF<sub>3</sub> (<b>1</b>), -OCF<sub>3</sub> (<b>2</b>), -SCF<sub>3</sub> (<b>3</b>), -SO<sub>2</sub>CF<sub>3</sub> (<b>4</b>)] have been investigated. The physical and optoelectronic properties of the four complexes were comprehensively characterized, including by X-ray diffraction analysis. All the complexes exhibit quasi-reversible dtBubpy-based reductions from -1.29 V to -1.34 V (<i>vs</i>. SCE). The oxidation processes are likewise quasi-reversible (metal+C^N ligand) and are between 1.54- 1.72 V (<i>vs</i>. SCE). The relative oxidation potentials follow a general trend associated with the Hammett parameter (σ) of the EWGs. Surprisingly, complex <b>4</b> bearing the strongest EWG does not adhere to the expected Hammett behavior and was found to exhibit red-shifted absorption and emission maxima. Nevertheless, the concept of introducing EWGs was found to be generally useful in blue-shifting the emission maxima of the complexes (λ<sub>em</sub> = 484-545 nm) compared to that of the prototype complex [Ir(ppy)<sub>2</sub>(d<i>t</i>Bubpy)]PF<sub>6</sub> (where ppy = 2- phenylpyridinato) (λ<sub>em</sub> = 591 nm). The complexes were found to be bright emitters in solution at room temperature (Φ<sub>PL</sub> = 45-66%) with long excited-state lifetimes (τ<sub>e</sub> = 1.14-4.28 μs). The photophysical properties along with Density Functional Theory (DFT) calculations suggest that the emission of these complexes originates from mixed contributions from ligand-centered (LC) transitions and mixed metal-to-ligand and ligand-to-ligand charge transfer (LLCT/MLCT) transitions, depending on the EWG. In complexes <b>1</b>, <b>3</b> and <b>4</b> the <sup>3</sup>LC character is prominent over the mixed <sup>3</sup>CT character while in complex <b>2</b>, the mixed <sup>3</sup>CT character is much more pronounced, as demonstrated by DFT calculations and the observed positive solvatochromism effect. Due to the quasi-reversible nature of the oxidation and reduction waves, fabrication of light emitting electrochemical cells (LEECs) using these complexes as emitters was possible with the LEECs showing moderate efficiencies.