A5005850411- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Transition Metal Oxide Nanomaterials
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Polymer crystallization and properties
- Perovskite Materials and Applications
- Laser Material Processing Techniques
- Photochromic and Fluorescence Chemistry
- Electrocatalysts for Energy Conversion
- Synthesis and Properties of Aromatic Compounds
- Synthesis and properties of polymers
- Electrochemical sensors and biosensors
- Porphyrin and Phthalocyanine Chemistry
- Advanced Memory and Neural Computing
- Fullerene Chemistry and Applications
- Photonic Crystals and Applications
- Machine Learning in Materials Science
- Advanced Physical and Chemical Molecular Interactions
- Nonlinear Optical Materials Studies
- Semiconductor materials and interfaces
- Analytical Chemistry and Sensors
Université de Bordeaux
2019-2024
Institut des Sciences Moléculaires
2021-2024
Institut Polytechnique de Bordeaux
2020-2024
Centre National de la Recherche Scientifique
2020-2024
Aix-Marseille Université
2024
Centre Interdisciplinaire de Nanoscience de Marseille
2024
Laboratoire de Chimie des Polymères Organiques
2019-2023
Politecnico di Milano
2012-2018
Tecnologia Energia Ambiente Materiali (Italy)
2018
Abstract Organic mixed ionic‐electronic conductors (OMIEC) have emerged as pivotal materials in organic bioelectronics, particularly when integrated into electrochemical transistors (OECTs). Conducting polymer‐based devices indeed demonstrated their capability to transduce biological signals amplified output signals, harnessing the high transconductance of OECTs. The OECT operating principle and sensing strongly depend on ion‐conjugated backbone coupling: dual nature OMIECs, i.e....
Abstract Organic mixed conductors find use in batteries, bioelectronics technologies, neuromorphic computing, and sensing. While great progress has been achieved, polymer‐based frequently experience significant volumetric changes during ion uptake/rejection, i.e., doping/de‐doping charging/discharging. Although dynamics may be enhanced expanded networks, these can have undesirable consequences, e.g., negatively affecting hole/electron conduction severely shortening device lifetime. Here, the...
The first solvent-free crystal structure of PCBM, an organic semiconductor widely used in nanocrystalline films plastic solar cells, is reported and its relevance to structure–property relationships discussed. PCBM structure, obtained from o-dichlorobenzene solvates by solvent abstraction, was solved using powder diffraction, demonstrating this possibility for functionalized fullerenes.
Organic mixed ionic electronic conductors (OMIECs) have the potential to enable diverse new technologies, ranging from biosensors flexible energy storage devices and neuromorphic computing platforms. However, a study of these materials in their operating state, which convolves both passive potential-driven solvent, cation, anion ingress, is extremely difficult, inhibiting rational material design. In this report, we present novel approach situ studies electrochemical switching prototypical...
OECTs soaked in an electrolyte for up to 40 days produced with a low swelling mixed conductor, poly[3-(6-hydroxy)hexylthiophene] (P3HHT), showed enhanced stability their electrochemical performance comparison PEDOT:PSS-based OECT.
Two crystal polymorphs of a thiophene–phenylene hexamer with bulky terminal substituents are characterized by different molecular conformations and parallel versus herringbone packing. Irrespective their similar emissive spectra common H-aggregate features, evidenced structure analysis confirmed solid-phase excited-state first-principles calculations, luminescence is relatively high and, for one form, nearly double than that the other. Interaromatic packing energy contributions established...
The fullerene derivative PCBM ([6,6]phenyl-C61-butyric acid methyl ester) is one of the best electron acceptors used so far in solution-processed organic photovoltaic devices. reasons for this success depend partly on its favourable electronic properties, solubility common solvents and plausibly also possibility to optimize structure morphology by post-deposition treatments (solvent or thermal annealing). latter feature still largely a matter speculation, as experimentally validated...
In situ UV-vis-NIR spectroelectrochemistry has been intensively used to evaluate the electronic transitions during charging/discharging process of π-conjugated polymers. However, type charge carrier and mechanisms their transport, remains still a point discussion. Herein, coupling between spectroscopy in electrochemical-conductance measurements is proposed compare doping three different thiophene-based conducting The simultaneous monitoring electrical absorption properties, associated with...
A model mixed-conducting polymer, blended with an amphiphilic block-copolymer, is shown to yield systems drastically enhanced electro-chemical doping kinetics, leading faster electrochemical transistors a high transduction. Importantly, this approach robust and reproducible, should be readily adaptable other mixed conductors without the need for exhaustive chemical modification.
Abstract Optoelectronic properties of linear π‐conjugated polymers/oligomers are great importance for the fabrication organic photonic and electronic devices. To this end, need to meet both optoelectronic key structural in order fulfill their implementation as active components. In particular, they possess low bandgap high thermal, conformational, photochemical stabilities. So far, several strategies have been developed attain such requirements including covalent non‐covalent rigidification...
This paper contains a brief discussion of the role detailed structural and computational studies, within general field organic photovoltaics. We review some our recent work on poly(3-butylthiophene) (P3BT) [6,6]phenyl-C61-butyric acid methyl ester (PCBM). The first is prototypical hole-transporting material, whose crystal forms I.’ II were solved by us through combined use powder Xray diffraction, electron diffraction molecular modelling. PCBM widely used fullerene derivative with...
Polymorphism and related solid-state phase transitions affect the structure morphology hence properties of materials, but they are not-so-well understood. Atomistic computational methods can provide molecular-level insights, have rarely proven successful for between polymorphic forms crystalline polymers. In this work, we report atomistic molecular dynamics (MD) simulations poly(3-alkylthiophenes) (P3ATs), widely used organic semiconductors to explore experimentally observed, entropy-driven...
Hole transporting layers (HTL) in polymer solar cells remain a subject of importance to enable enhanced efficiency and stability compared the benchmark PEDOT:PSS. The design an interlayer based on same as one used bulk heterojunction (BHJ) is reported here. In this HTL, doped, thus forming so‐called homojunction. conductivity PTQ10 doped with magic blue optimized for varying dopant concentrations. resulting show competing power conversion widely PEDOT:PSS improved stability. This strategy...
Abstract Conducting polymers find applications as active materials in electrochromic devices thanks to their tunable optoelectronic and electrochemical properties. Such versatility can be further enhanced by copolymerizing various aromatic monomers order produce new materials. In this work, we present different copolymers obtained electropolymerization of an N‐substituted dithienylpyrrole (SNSBA) with either 3,4‐ethylendioxythiophene (EDOT) or bithiophene (BTh). The electrochemical,...
The desire to increase the performance of optoelectronic devices has driven research into new, versatile optical materials. Among these, materials combinations composed organic polymers and inorganic have sparked a strong interest due wide range refractive indices that are obtainable. However, in parallel these design discovery activities, simple, broadly applicable fabrication techniques need be advanced adapted novel systems allow, for instance, straightforward, large‐area manufacturing...