A5084871759- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Thin-Film Transistor Technologies
- Chalcogenide Semiconductor Thin Films
- solar cell performance optimization
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Porphyrin and Phthalocyanine Chemistry
- Recycling and Waste Management Techniques
- Inorganic Fluorides and Related Compounds
- Catalytic Processes in Materials Science
- Green IT and Sustainability
- Semiconductor materials and interfaces
- Electronic and Structural Properties of Oxides
- Material Science and Thermodynamics
- Photovoltaic Systems and Sustainability
- 2D Materials and Applications
- Synthesis and properties of polymers
CEA LITEN
2012-2024
Université Grenoble Alpes
2017-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2024
Institut National de l'Énergie Solaire
2008-2023
CEA Grenoble
2008-2023
Office National d'Études et de Recherches Aérospatiales
2023
Technical University of Denmark
2010-2012
Université Clermont Auvergne
2008-2010
Clermont Université
2010
Centre National de la Recherche Scientifique
2008-2010
Abstract Improving the long-term stability of perovskite solar cells is critical to deployment this technology. Despite great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It therefore challenging reproduce compare results thereby develop a deep understanding degradation mechanisms. Here, we report consensus between researchers field for testing cell stability, which are based International Summit Organic...
A comparative photochemical stability study of a wide range π-conjugated polymers relevant to polymer solar cells is presented. The behavior each material has been investigated under simulated sunlight (1 sun, 1000 W m−2, AM 1.5G) and ambient atmosphere. Degradation was monitored during ageing combining UV-visible infrared spectroscopies. From the comparison collected data, influence chemical structure on its discussed. General rules relative structure–stability relationship are proposed.
We present the synthesis of a low band gap copolymer based on dithienothiophene and dialkoxybenzothiadiazole (poly(dithienothiophene-co-dialkoxybenzothiadiazole), PDTTDABT). The optical properties polymer showed 1.6 eV sky-blue color in solid films. was explored roll-to-roll coating experiments optimized with respect to manufacturing process mixing ratio [60]PCBM through series variation composition steps 1% w/w respectively PDTTDABT relatively broad optimimum found around 1:2 ratio....
Abstract We studied the role that singlet oxygen plays in solid‐state photochemistry of poly(3‐hexylthiophene) (P3HT). The photosensitized formation by P3HT and its subsequent reactivity on polymer were investigated. Using a fluorescent probe, it was found ( 1 O 2 ) could be produced irradiation photosensitization, with no oxidation polymer. In addition, directly formed via chemical reaction, again These results give strong evidence is not principal photo‐oxidative degradation intermediate...
Roll-to-roll coated organic solar cells of two new polymers processed in ambient conditions show good photochemical stabilities, and their efficiencies are comparable to similar roll-to-roll P3HT cells. Optimal blend compositions achieved by the use differentially pumped slot die coatings. The final devices stabilities an outdoor experiment carried out over 4 months. field polymer (PSCs) has progressed greatly last years. Many have been developed optimized with introduction low-bandgap (LBG)...
As the new space revolution unfolds, need for cost-effective photovoltaics is growing. In this context, alternative solar technologies, in particular, perovskites, are gaining attention since they hold promises of price competitiveness, high specific power, and compatibility with rollable/foldable arrays. However, strong R&D effort remains before perovskites can effectively power a mission; instance, better understanding constraints related degradation modes utmost importance. that...
We show that it is possible to perform ellipsometry on large area roll-to-roll (R2R) coated solar cells flexible substrates and further demonstrate the slot-die coating technique employed yields same bulk heterojunction (BHJ) film morphology vertical phase separation as laboratory samples prepared by spin technique. The cell device geometry was Kapton/Al/Cr/P3HT:PCBM/PEDOT:PSS/Ag. Variable angle used determine optical dispersions of pure phases P3HT PCBM allowing an effective medium...
Abstract We report a fast, reliable and non-destructive method for quantifying the homogeneity of perovskite thin films over large areas using machine vision. adapt existing vision algorithms to spatially quantify multiple film properties (substrate coverage, thickness, defect density) with pixel resolution from pictures 25 cm 2 samples. Our tool—called PerovskiteVision—can be combined an optical model predict photovoltaic cell module current density thickness. use measured predicted device...
The association of the electron acceptor 4,4'-amino-bipyridinium (AmV2+) dication and BiI3 in an acidic solution affords three organic-inorganic hybrid materials, (AmV)3(BiI6)2 (1), (AmV)2(Bi4I16) (2), (AmV)BiI5 (3), whose structures are based on isolated BiI63- Bi4I164- anion clusters 1 2, respectively, a one-dimensional (1D) chain trans-connected corner-sharing octahedra 3. In contrast with known methylviologen-based hybrids, these compounds more soluble polar solvents, allowing thin film...
New low-band gap polymers based on dithienylbenzothiadiazole (DBT) and dithiophene with different bridging atoms have been synthesized explored in a comparative study the photochemical stability photovoltaic performance. Two differently modified DBT units were exploited, namely 5,6-bis(tetradecyloxy)-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (DBT1) 4,7-bis(4-dodecylthiophen-2-yl)benzo[c][1,2,5]thiadiazole (DBT2). In thin films had optical band gaps range of 1.51–1.70 eV where DBT2 are...
The use of Nafion(®) as the hole extraction layer in polymer solar cells is demonstrated this work. Inverted devices were built on plastic foil with following architecture: PET/ITO/ZnO/P3HT:PCBM/Nafion(®)/Ag. was processed from a surfactant-free solution alcoholic solvents top active layer. Optimization film thickness and annealing yielded fully functional power conversion efficiency similar to others referenced, along good operational stability.