A5029142289- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Photochromic and Fluorescence Chemistry
- Advanced Photocatalysis Techniques
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- solar cell performance optimization
- Transition Metal Oxide Nanomaterials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Advanced Thermoelectric Materials and Devices
- Luminescence Properties of Advanced Materials
- Advanced Sensor and Energy Harvesting Materials
- Fullerene Chemistry and Applications
- Organic Light-Emitting Diodes Research
Institut polytechnique de Grenoble
2024-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2020-2025
Université Grenoble Alpes
2023-2025
CEA Grenoble
2020-2025
Centre National de la Recherche Scientifique
2023-2025
Systèmes Moléculaires et nanoMatériaux pour l'Énergie et la Santé
2025
CEA LITEN
2024
Universidad Pablo de Olavide
2018-2023
University of Bath
2022
University of Southampton
2022
Metal halide perovskites are mixed electronic–ionic semiconductors with an extraordinarily rich optoelectronic behavior and the capability to function very efficiently as active layers in solar cells, a record efficiency surpassing 23% nowadays.
Abstract Semi‐transparent solar cells are emerging as promising devices for building integrated photovoltaics. However, regardless of the technology considered, optical transmission semi‐transparent is fixed during fabrication process, and hence, cannot adjust to variations in daylight or weather conditions. This becomes an issue when applications such photovoltaic windows envisioned. Previously, it has been reported that use photochromic naphthopyran dyes dye‐sensitized (DSSC) allows...
Frequency domain techniques are useful tools to characterize processes occurring on different time scales in solar cells and fuel devices. Intensity-modulated photocurrent spectroscopy (IMPS) is one such technique that links the electrical optical responses of device. In this review, a summary fundamental application IMPS semiconductor photoelectrodes nanostructured presented, with final goal understanding response perovskite cell (PSC) shed light its complex physical mechanisms operation....
Interpreting the impedance response of perovskite solar cells (PSCs) is significantly more challenging than for most other photovoltaics. This a variety reasons, which significant are mixed ionic-electronic conduction properties metal halide perovskites and difficulty in fabricating stable, reproducible, devices. Experimental studies, conducted on PSCs, produce spectra shapes. However, they all possess common features, noteworthy that have at least two high low frequency, with different...
Impedance spectroscopy (IS) is a straightforward experimental technique that commonly used to obtain information about the physical and chemical characteristics of photovoltaic devices. However, nonstandard behavior perovskite solar cells (PSCs), which are heavily influenced by motion mobile ion vacancies, has hindered efforts consistent theory PSC impedance. This work rectifies this omission deriving simple analytic model impedance response from underlying drift-diffusion charge-carrier...
Because they can be made semi-transparent, dye-sensitised solar cells (DSSCs) have great potential for glazing applications. Their photovoltaic performance and light transmission depend not only on the dye used, but also electrolyte contain. A few years ago, we introduced concept of with dynamic optical properties based use photochromic photosensitizers. These allow variable according to sunlight conditions, while producing electrical energy. We found that electrolytes commonly used in DSSCs...
The application of perovskite photovoltaics is hampered by issues related to the operational stability upon exposure external stimuli, such as voltage bias and light. dynamic control properties materials in response light could ensure durability solar cells, which especially critical at interface with charge-extraction layers. We have applied a functionalized photochromic material based on spiro-indoline naphthoxazine hole-transport layers corresponding cells aim stabilizing them demonstrate...
A combination of experimental studies and drift‐diffusion modeling has been used to investigate the appearance inverted hysteresis, where area under J–V curve for reverse scan is lower than in forward scan, perovskite solar cells. It found that cells p–i–n configuration show hysteresis at a sufficiently high rate, whereas n–i–p tend have normal hysteresis. By examining influence composition charge transport layers, film crystallinity preconditioning treatment, possible causes presence are...
Photochromic dyes possess unique properties that can be exploited in different domains. Here, we investigate the potential of spiro-indoline naphthopyran and naphthoxazine photovoltaics.
Intensity Modulated Photocurrent Spectroscopy (IMPS) is a small-perturbation optoelectronic technique that measures the quantum efficiency of photoelectrochemical device as function optical excitation frequency. Metal Halide Perovskites (MHPs) are mixed electronic–ionic semiconductors with an extraordinary complex behavior and record surpassing 25%. In this paper, we propose simplified procedure to analyze IMPS data in MHPs based on analysis internal time signals featuring frequency spectra....
Recombination mechanisms in solar cells are frequently assessed through the determination of ideality factors. In this work we report an abrupt change value "apparent" factor (n
Ion migration mechanisms are often behind degradation pathways in perovskite solar cells under operating conditions.
We report the design, synthesis and characterization of push-pull photochromic naphthopyran dyes, incorporating different carbazole moieties as electron-donor group for use in dye-sensitized solar cells. Compared to a reference dye diphenylamine-type donor moiety, introduction functionalized carbazoles allows hypsochromic shift absorption coloured isomers dyes visible region better tuning their spectra photopic response human eye. Under illumination, molecules exhibit broad with maximum...
Photochromic dye-sensitized solar cells (DSSCs) are novel semi-transparent photovoltaic devices that self-adjust their optical properties to the irradiation conditions, a feature makes them especially suitable for building integrated photovoltaics. These have already achieved efficiencies above 4%, and there multiple pathways improve performance. In this work, we conduct full characterization of DSSCs with photochromic dye NPI, combining electrical impedance spectroscopy (EIS)...
The efficiency of electron collection in a dye‐sensitized solar cell (DSC) is determined by delicate balance between electronic transport and recombination losses caused transfer to dye cations acceptors. While state‐of‐the‐art DSCs have demonstrated quantitative under standard 1 sun conditions, the nonlinear nature trapping/detrapping dynamics photoanode with respect stored charge can result suboptimal performance low illumination intensity conditions commonly found indoors. Herein, key...
We recently demonstrated that diaryl-naphthopyran photochromic dyes are efficient for sensitization of TiO2 mesoporous electrodes, thus allowing the fabrication photo-chromo-voltaic cells can self-adapt their absorption light and generation electricity with intensity. Herein we report synthesis, characterisation two novel based on core i.e NPI-ThPh NPI-FuPh use in Dye Sensitized Solar Cells (DSSCs). Compared to our reference dye NPI, molecules only vary by nature spacer, a thiophene or...
We present the simple synthesis of a star-shape non-fullerene acceptor (NFA) for application in organic solar cells. This NFA possesses D(A)3 structure which electron-donating core is an aza-triangulene unit and we report first crystal star shape based on this motive. fully characterized molecule's optoelectronic properties solution thin films, investigating its photovoltaic when blended with PTB7-Th as electron donor component. demonstrate that leads to strong absorption visible range edge...
Although perovskite solar cells have demonstrated impressive efficiencies in research laboratories (above 25%), there is a need for developing experimental procedures to fabricate under ambient conditions substantially decrease manufacturing costs. Nevertheless, achieve efficient and highly stable devices these conditions, the moisture level atmosphere must be monitored. Relative humidity (RH) has classically been parameter of choice; however, this work, we show that relevance absolute...
Abstract In this work we report a simple and cost‐effective CsPbBr 3 ‐based solar cell without ordinary selective contacts. To do so follow an electrochemical approach consisting of three successive steps: (1) electrodeposition PbO 2 directly on top FTO substrates, (2) heterogeneous phase reaction with gaseous HBr (3) spin‐coating methanolic CsBr solutions followed by annealing. This method is more adequate for large‐scale environmentally friendly production as it reduces chemical waste,...
The development of hole transport materials (HTMs) is a prolific area research due to the application these in various technologies such as organic light-emitting diodes (OLEDs) or perovskite solar cells (PSCs). HTMs have notably played crucial role high-performance PSCs since devices, they not only ensure collection and holes counterelectrode but also play an important on device stability. In addition need for good properties be easy process, it paramount importance guarantee that their...