A5083259433- Perovskite Materials and Applications
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Chalcogenide Semiconductor Thin Films
- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Semiconductor materials and interfaces
- Quantum Dots Synthesis And Properties
- Industrial Vision Systems and Defect Detection
- Analytical Chemistry and Sensors
- Luminescence Properties of Advanced Materials
- Integrated Circuits and Semiconductor Failure Analysis
- Copper-based nanomaterials and applications
- Organic Electronics and Photovoltaics
- Infrared Target Detection Methodologies
- solar cell performance optimization
- Advanced battery technologies research
- Adaptive optics and wavefront sensing
- Electronic and Structural Properties of Oxides
- Mycorrhizal Fungi and Plant Interactions
- Advanced Measurement and Detection Methods
- South Asian Studies and Conflicts
- History and Politics in Latin America
- Structural Engineering and Vibration Analysis
- Silicon and Solar Cell Technologies
Institute for Atomic and Molecular Physics
2024
Universitat Jaume I
2020-2024
Southern Astrophysical Research Telescope
2006
Despite the promising properties of tin-based halide perovskites, one clear limitation is fast Sn+2 oxidation. Consequently, preparation long-lasting devices remains challenging. Here, we report a chemical engineering approach, based on adding Dipropylammonium iodide (DipI) together with well-known reducing agent, sodium borohydride (NaBH4), aimed at preventing premature degradation Sn-HPs. This strategy allows for obtaining efficiencies (PCE) above 10% enhanced stability. The initial PCE...
We demonstrate highly efficient, stable, and flexible perovskite solar cells of large areas, utilizing a carbon back-contact electrode in p–i–n cell configuration. enabled good electronic contact at the interface with by inserting an ultrathin buffer layer before coating. Solar such structure reach power conversion efficiency 15.18% on PET foil (device area 1 cm2). performed impedance spectroscopy transient decay measurements to understand electron transport characteristics. Furthermore, we...
Negative capacitance in the low-frequency domain and inverted hysteresis are familiar features perovskite solar cells, which origin is still under discussion. Here we use impedance spectroscopy to analyze these responses methylammonium lead bromide cells treated with lithium cations at electron-selective layer/perovskite interface iodide devices exposed different relative humidity conditions. Employing surface polarization model, obtain a time constant associated kinetics of interaction...
En el presente trabajo reportamos hallazgo de un ejemplar muerto Comesebo Patagónico (Phrygilus patagonicus) hallado en una forestación exótica la Base Naval Puerto Belgrano, constituyendo primer registro para provincia Buenos Aires, y primero por fuera las ecorregiones andinas patagónicas.
Abstract Small‐perturbation techniques such as impedance spectroscopy (IS), intensity‐modulated photocurrent (IMPS), and photovoltage (IMVS) are useful tools to characterize model photovoltaic photoelectrochemical devices. While the analysis of spectra is generally carried out using an equivalent circuit, spectroscopies often analyzed through measured characteristic response times. This makes correlation between two methods unclear. In this work, by taking into consideration absorptance...
Research on metal halide perovskites as absorbers for X-ray detection is an attractive subject due to the optimal optoelectronic properties of these materials high-sensitivity applications. However, contact degradation and long-term instability current limit performance devices, in close causality with dual electronic-ionic conductivity perovskites. Herein, millimeter-thick methylammonium-lead bromide (MAPbBr3) single polycrystalline samples are approached by characterizing their dark...
Abstract The inherent ion migration in metal halide perovskite materials is known to induce deleterious and highly unstable dark currents X‐ γ ‐ray detectors based on those compounds upon bias application. Dark current slow drift with time identified as one of the major drawbacks for these devices satisfy industrial requirements. Because establishes detectability limit, evolution, eventual growth may mask photocurrent signals produced by incoming X‐ray photons. Relevant information detector...
The migration of mobile ions through the metal halide perovskite layer is still one main reasons for poor stability solar cells, LEDs, and photodetectors. To characterize in layer, time- frequency-based electrical measurements are promising techniques. However, presence transport layers complicates their interpretation, limiting information about that can be extracted, it not clear how different features frequency- time-domain relate to ions. Here, we a transport-layer-free device with...
In this work, we identify the importance of C60 and compact-TiO2 (cTiO2) as electron transport layers on device performance coevaporated n–i–p perovskite solar cells. We found (1) a synergetic effect between both when extracting charges (2) that optimization layer is essential for obtaining devices with enhanced performance. particular, an optimum thickness (<15 nm) enhances charge extraction employed in cell. With thicker (>20 nm), additional resistance observed by impedance analysis,...
Recently, several strategies have been adopted for the cesium lead halide, CsPbX3 (X = Cl, Br, and/or I), crystal growth with a perovskite-type structure, paving way further development of innovative optoelectronic and photovoltaic applications. The properties advanced materials are controlled, in principle, by effects morphology, particle size, composition, as well imperfections these parameters. Herein, we report detailed investigation, using theoretical experimental approaches to evaluate...
Impedance spectroscopy (IS), intensity‐modulated photocurrent (IMPS), and photovoltage (IMVS) are well‐established powerful modulated techniques to characterize optoelectronic devices. Their combined use has proven provide an understanding of the behavior performance these systems, far beyond output obtained from their independent analysis. However, this combination is shown be challenging when applied complex systems. Herein, IS, IMPS, IMVS cooperatively used, for first time, study...
Abstract Light intensity modulated photocurrent and photovoltage spectroscopies, IMPS IMVS respectively, are characterization techniques for studying charge carrier transport recombination properties of photosensitive samples such as photovoltaic solar cells. In these controlling the light flux is key to obtaining accurate results. Typically, electroluminescence source considered frequency-independent therefore, it may be estimated from current delivered by power source. However, some...
Insights into the Operational Mechanisms of Halide Perovskite MemristorsAgustin O. Alvarez a, Jeroen de Boer Bruno Ehrler aa Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The NetherlandsInternational Conference on Hybrid and Organic PhotovoltaicsProceedings International Photovoltaics (HOPV24)València, Spain, 2024 May 12th - 15thOrganizer: EhrlerOral, Agustin Alvarez, presentation 082DOI: https://doi.org/10.29363/nanoge.hopv.2024.082Publication date: 6th February...