A5057423649- Transition Metal Oxide Nanomaterials
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Perovskite Materials and Applications
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- ZnO doping and properties
- Advanced Electron Microscopy Techniques and Applications
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Semiconductor materials and interfaces
- Advanced Condensed Matter Physics
- Copper-based nanomaterials and applications
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
- Electron and X-Ray Spectroscopy Techniques
- MXene and MAX Phase Materials
- Semiconductor Quantum Structures and Devices
- Silicon Nanostructures and Photoluminescence
- Radioactive element chemistry and processing
Utrecht University
2021-2025
University of Twente
2025
University of Tabriz
2020
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2018-2020
Perovskite solar cells (PSCs) based on organic-inorganic metal halide perovskites are a recent ground-breaking advancement in attaining power conversion efficiencies exceeding 21%. However, the toxicity of lead these PSCs could be deterrent for large-scale development due to environmental concerns. The methylammonium tin triiodide (CH3NH3SnI3) perovskite has been successfully employed lead-free as an alternative CH3NH3PbI3 perovskite. have mostly realized with highly expensive spiro-OMeTAD...
Carrier dynamics affects photocatalytic systems, but direct and real-time observations in an element-specific energy-level-specific manner are challenging. In this study, we demonstrate that the of photo-generated holes metal oxides can be directly probed by using femtosecond X-ray absorption spectroscopy at free-electron laser. We identify energy level life time with a long (230 pico-seconds) nano-crystal materials. also observe trapped show distribution bandgap region formation 0.3...
Abstract Solid‐state electrolytes (SSEs) with high ionic conductivities are crucial for safer and high‐capacity batteries. Interface effects in nanocomposites of SSEs insulators can lead to profound increases conductivity. Understanding the composition interface is tuning conductivity composite solid electrolytes. Herein, X‐ray Raman Scattering (XRS) spectroscopy used first time unravel nature responsible enhancements complex hydride‐based (LiBH 4 , NaBH NaNH 2 ) oxides. XRS probe Li, Na, B...
We study the electrocatalytic oxygen evolution reaction using in situ X-ray absorption spectroscopy (XAS) to track dynamics of valence state and covalence metal ions LaFeO3 LaFeO3/LaNiO3 thin films. The active materials are 8 unit cells grown epitaxially on 100 nm conductive La0.67Sr0.33MnO3 layers pulsed laser deposition (PLD). perovskite supported monolayer Ca2Nb3O10 nanosheet-buffered SiNx membranes. Fe Ni K-edges XAS spectra were measured from backside membrane fluorescence yield...
Abstract The wide tunability of strongly correlated transition metal (TM) oxides stems from their complex electronic properties and the coupled degrees freedom. Among perovskite family, LaMO 3 (M = Ti-Ni) allows an M-dependent systematic study structure within same-structure-family motif. While most studies have been focusing on 3d TMs oxygen sites, role rare-earth site has far less explored. In this work, we use resonant inelastic X-ray scattering (RIXS) at lanthanum N 4,5 edges density...
Abstract Conducting real‐time, element‐specific studies of photo‐excited systems is a long‐standing challenge. The development X‐ray free‐electron lasers (XFELs) has paved the way for emergence promising technique: femtosecond absorption spectroscopy (fs‐XAS). This powerful technique reveals electronic and geometric characteristics, providing unprecedented insight into their dynamic interactions under nonequilibrium conditions. Herein, fs‐XAS employed at PAL‐XFEL to unravel light‐driven...
Solid-state electrolytes play a key role in the development of safe and high-capacity all-solid-state batteries. Complex hydrides such as Li2B12H12 are attractive solid due to their low weight good electrochemical stability, but suffer from conductivities at room temperature. Herein, we report three-order-magnitude increase ionic conductivity upon nanocomposite formation with ZrO2 via mechanochemical treatment, reaching 2.9 × 10-4 S cm-1 30 °C. Results infrared spectroscopy, X-ray Raman...
A large and rapidly expanding class of two-dimensional (2D) metal carbides, nitrides, carbonitrides called MXenes, with their interesting photovoltaic applications tunable surface termination, has found a vast range in improving the performance perovskite solar cells (PSCs).
We present a comparative analysis of $1s$ and $2p$ core-level hard x-ray photoelectron spectroscopy (HAXPES) spectra metallic ${\mathrm{VO}}_{2}$ ${\mathrm{CrO}}_{2}$. Even though the V in show similar line shapes except for absence/presence spin-orbit splitting core levels, Cr exhibit distinct main-line shapes. The experimental HAXPES are analyzed by Anderson impurity model based on density functional theory $+$ dynamical mean-field conventional ${\mathrm{MO}}_{6}$ cluster model. examine...
Abstract The study of polaron dynamics in complex materials has garnered significant attention owing to its implications for various technological applications, including catalysis, solid‐state devices, and energy storage. This paper investigates the photo‐excited electron hole cerium dioxide (CeO 2 ) using time‐resolved X‐ray absorption spectroscopy, with an emphasis on nano‐size effect. Additionally, density functional theory multiplet calculations have been utilized reveal CeO single...
The plasma treatment affects the size distribution of amorphous phase TiO<sub>2</sub> nanoparticles and leaves crystalline unaltered.
We present a comparative analysis of 1$s$ and 2$p$ core-level hard X-ray photoelectron spectroscopy (HAXPES) spectra in metallic VO$_2$ CrO$_2$. Even though the V display similar line shapes except absence or presence spin-orbit coupling splitting, Cr exhibit distinct main-line shapes. The experimental HAXPES are analyzed by Anderson impurity model based on density functional theory + dynamical mean-field conventional MO$_6$ cluster model. elucidate complex interplay between formation...
Spray pyrolysis technique was applied to deposit two sets of ultra‐thin layers tin dioxide (SnO 2 ). For the first and second sets, 0.01 0.05 molar precursor solutions were prepared, respectively. In both utilizing X‐ray reflectivity (XRR) technique, effect concentration (PC) volume (PV) on layer structure are investigated. The thickness samples, in each set, is a PV‐dependent parameter. same PV, samples with higher PC have larger density. electron density profiles deduced from XRR data...