A5058640013- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Light-Emitting Diodes Research
- Semiconductor materials and devices
- Thin-Film Transistor Technologies
- Graphene research and applications
- Carbon Nanotubes in Composites
- Fullerene Chemistry and Applications
- Analytical Chemistry and Sensors
- Advanced Memory and Neural Computing
- Electron and X-Ray Spectroscopy Techniques
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- Semiconductor Lasers and Optical Devices
- TiO2 Photocatalysis and Solar Cells
- Semiconductor Quantum Structures and Devices
- Mechanical and Optical Resonators
- Diamond and Carbon-based Materials Research
- Advanced MEMS and NEMS Technologies
- Molecular Junctions and Nanostructures
- melanin and skin pigmentation
- X-ray Spectroscopy and Fluorescence Analysis
Université de Bordeaux
2014-2024
Institut Polytechnique de Bordeaux
2015-2024
Laboratoire de l'Intégration du Matériau au Système
2014-2024
Centre National de la Recherche Scientifique
2015-2024
Infection et inflammation
2012-2016
École Nationale Supérieure de Chimie, de Biologie et de Physique
2013-2014
Johannes Kepler University of Linz
2011-2013
National Interuniversity Consortium for the Physical Sciences of Matter
2008-2011
Università di Camerino
2008-2011
Institute of High Energy Physics
2003-2005
The effect of impurities on the optoelectronic and charge transport properties semiconducting polymers was investigated through performance organic photovoltaics (OPVs) field transistors (OFETs), respectively. A model representative polymer, i.e., poly(3-hexylthiophene) (P3HT), synthesized purified using different methods such as precipitation, metals' complexation, Soxhlet extraction. After purification processes, each fraction analyzed to determine its composition in metals (impurities) by...
Abstract Control and prediction of crystal structures molecular semiconductors are considered challenging, yet they crucial for rational design superior semiconductors. It is here reported that through methylthiolation, one can rationally control the structure pyrene derivatives as semiconductors; 1,6‐bis(methylthio)pyrene keeps a similar sandwich herringbone to parent pyrene, whereas 1,3,6,8‐tetrakis(methylthio)pyrene (MT‐pyrene) takes new type brickwork structure. Such changes in these...
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....
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.
All solution processed ambipolar bulk heterojunction organic field effect transistors were fabricated using Au and Al as hole electron injection contacts to study both types of charge carrier mobilities in a single device. Poly(3-hexylthiophene) (P3HT) [6,6]-phenyl C61 butyric acid methyl ester (PCBM) mixed with different ratios. Well balanced obtained at 1:0.3 ratio. Organic solar cells the same ratio yielded draft enhancement device performance parameters, indicating optimized transport...
Abstract The growth of micro electro-mechanical system (MEMS) based sensors on the electronic market is forecast to be invigorated soon by development a new branch MEMS-based made organic materials. Organic MEMS have potential revolutionize sensor products due their light weight, low-cost and mechanical flexibility. However, sensitivity stability in comparison inorganic been major concerns. In present work, an with cutting-edge transducer active field effect transistor (OFET) has...
Abstract Three 3,6‐di(4‐methoxyphenyl)amino N ‐alkylated carbazoles were synthesized, characterized and incorporated in solid state dye‐sensitized solar cells. Devices using these compounds as hole conductors showed relative high V oc thanks to good energy level matching between them D102 dye. However, they yield relatively low J sc FF compared spiro‐OMeTAD‐based control devices, which is due an order of magnitude lower mobility conductivity with respect spiro‐OMeTAD. Maximum PCEs for ‐ethyl...
Borondifluoride complexes of curcuminoid derivatives end-capped with triphenylamine groups were designed for solution-processed bulk-heterojunction organic solar cells. They obtained very simply in a one-pot synthesis from cheap building blocks. Compared to push–pull systems based on borondifluoride hydroxychalcones, curcuminoids present the donor–acceptor–donor electronic structure and exhibit significantly improved chemical thermal stability photovoltaic performance. Indeed, power...
Multiple functionality of tungsten polyoxometalate (POM) has been achieved applying it as interfacial layer for solution processed high performance In2O3 thin film transistors, which results in overall improvement device performance. This approach not only reduces off-current the by more than two orders magnitude, but also leads to a threshold voltage reduction, well significantly enhances mobility through facilitated charge injection from electrode active layer. Such mechanism elucidated...
Abstract High performance, air stable and solution-processed small molecule 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene (C 8 -BTBT) based organic field-effect transistors (OFETs) with various electrode configurations were studied in detail. The contact resistance of OFET devices Ag, Au, WO 3 /Ag, MoO /Au, /Au compared. Reduced consequently improved performance observed oxide interlayers compared to the bare metal electrodes. best oxide/metal combination was determined. possible mechanisms...
Nickel oxide nanowires modified by poly(vinylpyrrolidone) (PVP) were synthesized via a simple chemical pattern. For the first time NiO with diameters ranging from 40 to 100 nm expected ratio (length vs diameter) 54 90 grown using solution-phase approach (mild method). These nickel exhibited unique photoluminescence features and displayed significant UV luminescence. X-ray absorption near-edge spectroscopy has been used characterize local Ni environment identify electronic structure....
We have investigated the electronic states of highly oriented pyrolitic graphite and single-walled carbon nanotubes using x-ray absorption spectroscopy (XAS) before after annealing treatment in ultrahigh vacuum, observed that small peak between π* σ* features, which has been previously assigned to free-electron-like interlayer states, disappears situ treatment, suggesting signal may be a surface contamination, especially oxygen contamination introduced by chemical processing or gas...
The capability to monitor finely the physical properties of eumelanin, an important class biopolymers, involved in melanoma cancer pathologies, whose function and intrinsic disorder still collects interest many investigators, was achieved by means electrospray deposition (ESD). By alleviating problem solubility melanin through realization high-quality films it possible spread light on unknown biopolymer supramolecular organization. In fact, basis scanning probe microscopies, electron...
A directional crystallization of C8-BTBT-C8 in a temperature gradient reduces film roughness and improves in-plane alignment.
Water soluble poly(1-vinyl-1,2,4-triazole) (PVT) as a novel dielectric layer for organic field effect transistor is studied. Dielectric spectroscopy characterization reveals it has low leakage current and rather high breakdown voltage. Both n-channel p-channel transistors are fabricated using pentacene fullerene active layers. devices show device performances with lack of hysteresis, very threshold voltages on/off ratios. Excellent film formation property utilized to make AlO x thin PVT...
Abstract This article reports on the synthesis, characterization, and properties of various anthracene‐containing poly ( p ‐phenylene‐ethynylene)‐ alt ‐poly( ‐phenylene‐vinylene) (PPE‐PPV) polymers (AnE‐PVs) bearing statistical distributions side chains. Primarily, ratio linear octyloxy branched 2‐ethylhexyloxy chains at poly( ‐phenylene vinylene) (PPV) parts was varied, leading to stat , 1, 2. Furthermore, also containing asymmetric substituted PPV ethynylene) units (bearing methoxy chains)...
Effects of the chalcogen atoms in [1]benzochalcogenopheno[3,2-<italic>b</italic>][1]benzochalcogenophenes (BXBXs), key π-conjugated core structures development superior organic semiconductors, are investigated.