A5076224736- Fullerene Chemistry and Applications
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Graphene research and applications
- Carbon Nanotubes in Composites
- Perovskite Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Organic Electronics and Photovoltaics
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Synthesis and Properties of Aromatic Compounds
- Porphyrin and Phthalocyanine Chemistry
- Photochromic and Fluorescence Chemistry
- Electrocatalysts for Energy Conversion
- Advancements in Photolithography Techniques
- Polyoxometalates: Synthesis and Applications
- Nonlinear Optical Materials Studies
- Advanced Physical and Chemical Molecular Interactions
- Advanced Nanomaterials in Catalysis
- Chemical Reactions and Mechanisms
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010-2024
CEA Paris-Saclay
2020-2024
Université Paris-Saclay
2020-2024
Centre National de la Recherche Scientifique
2010-2024
Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux
2023
Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Énergie
2023
Solaronix (Switzerland)
2012-2020
Audubon Nature Institute
2015
University of Castilla-La Mancha
2005-2013
Leibniz Institute for Solid State and Materials Research
2006-2011
Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far market requirements. Various technological approaches have been proposed to overcome instability problem, which, while delivering appreciable incremental improvements, still from a market-proof solution. Here we show one-year devices engineering an ultra-stable 2D/3D (HOOC(CH2)4NH3)2PbI4/CH3NH3PbI3 junction. The forms...
Among the new photovoltaic technologies, Dye-Sensitized Solar Cell (DSC) is becoming a realistic approach towards energy markets such as BIPV (Building Integrated PhotoVoltaics). In order to improve performances of DSCs and increase their commercial attractiveness, cheap, colourful, stable highly efficient ruthenium-free dyes must be developed. Here we report synthesis complete characterization purely organic sensitizer (RK1) that can prepared synthetically upscaled rapidly. cells containing...
Summary of photocurrent <italic>vs.</italic> time and (inset) total theoretical H<sub>2</sub> generated for the 7 different NiO electrodes compared in this study.
We have studied the influence of three different fullerene derivatives on charge generation and recombination dynamics polymer/fullerene bulk heterojunction (BHJ) solar cell blends. Charge in APFO3/[70]PCBM APFO3/[60]PCBM is very similar somewhat slower than APFO3/[70]BTPF. This difference qualitatively matches trend free energy change electron transfer estimated from LUMO energies polymer derivatives. The first order (geminate) rate significantly for increases < variation cannot be...
Six organic dyes have been synthesized and used for the preparation of highly efficient stable DSSCs. The implementation one them in a solar module with large active area 1400 cm<sup>2</sup> is also presented.
Abstract Plastic solar cells have been fabricated using a low‐bandgap alternating copolymer of fluorene and donor–acceptor–donor moiety (APFO‐Green1), blended with 3′‐(3,5‐bis‐trifluoromethylphenyl)‐1′‐(4‐nitrophenyl)pyrazolino[70]fullerene (BTPF70) as electron acceptor. The polymer shows optical absorption in two wavelength ranges, λ < 500 nm 600 1000 nm. BTPF70 absorbs light at 700 A broad photocurrent spectral response the range 300 is obtained cells. density 3.4 mA cm –2 ,...
New benzothiadiazole-based dyes are synthesized, characterized and used for the fabrication of robust efficient solar cells mini-modules.
We unraveled the role of alkyl substituents, usually employed as solubilizing groups for organic sensitizers, in performances and stability photovoltaic devices.
2-Pyrazolino[4,5:1,2][60]fullerenes undergo a thermally induced retro-cycloaddition process whose efficiency is influenced by the nature of C-substituent. C-Aryl-N-Aryl-2-pyrazolino[60]fullerenes (2a−d) poorly thermal reaction even in presence strong dipolarophile or metal Lewis acid which, contrast to other fullerene derivatives, shows their remarkable stability. C-Alkyl-N-Aryl-2-pyrazolino[60]fullerenes (2e−f) show different behavior, being more vulnerable copper triflate and leading...
[60]Fullerene was functionalized with a TTF derivative and bis-mesogenic fragment. The synthetic methodology based on the addition of malonate to C60 (Bingel-type reaction). Both dyad showed smectic B A phases. supramolecular organization within layers monolayer type for bilayer fullerene derivative. In latter case, governed by unit.
Photoinduced energy transfer and electron processes have been found between the excited singlet state of Zn-porphyrin C(60) via an oligothienylenevinylene bridge depending on length oligothiophene solvent polarity.
Two novel donor-bridge-acceptor arrays (ZnP-nTV-C60) with zinc porphyrin (ZnP) and fullerene (C60), covalently connected by oligo(thienylenevinylene) (nTV) molecular wires (n = 3 8; ), have been prepared in a multistep convergent manner. The influence of the nTV-length on electrochemical electronic properties ZnP-nTV-C60 triads has revealed. Interestingly, an efficient photoinduced electron transfer process occurs both formation intermediate radical-ion pairs (namely, ZnP˙(+)-nTV-C60˙(-)...
Two new triads based on N-methylfulleropyrolidine, oligothienylenevinylenes (nTV) and ferrocene (Fc), namely C(60)-nTV-Fc (n=2, 4) have been synthesized. A HOMO-LUMO gap as low 1.09-1.11 eV was experimentally determined by cyclic voltammetry. In both polar nonpolar solvents, photoinduced charge-separation (CS) processes in predominantly take place from the singlet excited states of C(60) nTV; this result indicated steady time-resolved emission spectroscopy. case C(60)-4TV-Fc, CS state...
In this article, we set up a methodology to investigate the relationship between catalytic activity and agglomeration state of platinum group metal-free ORR catalysts. To end, have developed statistical approach based on scanning electrochemical microscopy (SECM) atomic force (AFM). Two catalysts are investigated at very low loadings in order access their intrinsic activity. Differences terms dispersion, stability inks, adherence substrate observed, highlighting importance measuring exact...
Perovskite solar cells (PSCs) have sparked great excitement in the photovoltaics community due to their remarkable efficiency, flexibility, and ability be synthesized at low cost. However, instability poses a major roadblock widespread adoption. Recognizing this challenge, work describes performance of stable PSCs operating under real‐life conditions Paris area. Two state‐of‐the‐art 2D/3D (HOOC(CH 2 ) 4 NH 3 )2PbI /CH PbI encapsulated are considered—one with maximum power point tracking...
The development of nanoscale materials is always closely connected with their characterization. One powerful method nondestructive analysis in the nanometer-depth region angle-resolved x-ray photoelectron spectroscopy (ARXPS). interpretation such ARXPS measurements, however, needs model calculations based on a priori assumptions (typically unknown) surface structure under investigation. For rough surfaces, there often can be uncertainties, misinterpretations, and/or artifacts. In this paper...
Abstract Angle‐resolved X‐ray photoelectron spectroscopy (ARXPS) has a great potential for nondestructive depth profiling in the nanometer thickness range. A method using computer simulation of ARXPS measurements is presented, which allows systematic studies on surfaces with artificial spatial inhomogeneity nanometer‐range. Investigations rough varied structure sizes show that inhomogeneous structures can be increasingly better described by homogeneous smooth layers when lowering typical...
Analytical routines for a comprehensive in‐depth morphological, structural, and chemical characterization of functionalized TiO 2 films by using different state‐of‐the‐art analytical techniques are presented discussed with the main objective to identify potential reference coating parameters able be certified at later stage. fabricated two synthetic procedures as representative large‐scale applications were selected: (i) pulsed d.c. magnetron sputtering photocatalytic (ii) screen printing...
Two new organic dyes incorporating triphenylamine as a donor and oligothienylenevinylene bridge have been synthesized. The cover the entire visible region power conversion of up to 6.25%.