A5006159298- Perovskite Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Semiconductor materials and devices
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Advancements in Solid Oxide Fuel Cells
- Chalcogenide Semiconductor Thin Films
- Covalent Organic Framework Applications
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Nuclear Materials and Properties
- Luminescence Properties of Advanced Materials
- Electronic and Structural Properties of Oxides
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Thermal Expansion and Ionic Conductivity
- Transition Metal Oxide Nanomaterials
- Nonlinear Optical Materials Research
- Metal-Organic Frameworks: Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Analytical Chemistry and Sensors
- Advanced Thermoelectric Materials and Devices
- Ammonia Synthesis and Nitrogen Reduction
University of Wisconsin–Madison
2022-2025
Indian Association for the Cultivation of Science
2021-2024
Bose Institute
2017-2024
National Energy Technology Laboratory
2023
University of Exeter
2020-2022
Intel (United States)
2022
University of Alabama
2022
Highly ion-conductive solid electrolytes of nonlithium ions (sodium or potassium ions) are necessary for pursuing a more cost-effective and sustainable energy storage. Here, two classes sulfonated −NH-linked covalent organic frameworks (COFs), specifically designed sodium ion conduction (named i-COF-2 (Na K) i-COF-3 K)), were synthesized through straightforward, one-step process using affordable starting materials. Remarkably, these COFs demonstrate high ionic conductivity at room...
MAPbX3 (MA = CH3NH3, X Br, I) are synthesized by the chemical route. The Rietveld refinement of room temperature X-ray diffraction pattern materials shows that MAPbBr3 is crystallized in cubic Pm3m crystal symmetry whereas MAPbI3 crystallizes tetragonal phase with space group I4/mcm. dielectric relaxation has been studied frequency range from 42 Hz to 0.2 MHz electric modulus formalism. time determined reciprocal where maximum imaginary part centred. mechanism samples investigated Cole-Cole...
Abstract Facet‐orientated double perovskite (DP) microcrystals (MCs) are of particular interest in optoelectronics due to the special symmetry and homogeneous interfaces, which extend carrier lifetime enhance mobility realize robust device performance. Here, a simple hot‐spin casting method is developed instantaneously synthesize highly crystalline lead‐free halide DP Cs 2 AgBiBr 6 MCs with facet‐orientation. The low temperature (130 °C) synthesis instigates growth only along packed (111)...
Sm<sub>2</sub>LiRuO<sub>6</sub> has a relatively large birefringence compared to Nd<sub>2</sub>LiRuO<sub>6</sub> and Pr<sub>2</sub>LiRuO<sub>6</sub>, which is important for mid-infrared nonlinear applications.
Single phase, polycrystalline perovskite oxide SrVO3, with its intrinsic low effective work function and facile synthesis process, is a promising thermionic electron emitter cathode candidate, in which previous works have shown evidence of an as 2.3 eV. In this work, we study the vacuum activation process SrVO3 find that it has emission stability over 15 days continuous high temperature operation. We shows surface Sr O segregation during operation, hypothesize needed to create positive...
Perovskite SrVO3 has recently been proposed as a novel electron emission cathode material. Density functional theory (DFT) calculations suggest multiple low work function surfaces, and recent experimental efforts have consistently demonstrated effective functions of ∼2.7 eV for polycrystalline samples, both results suggesting, but not directly confirming, that some fraction even lower surface is present. In this work, thermionic microscopy (ThEEM) high-field ultraviolet photoemission...
Solid-state batteries utilizing sodium or potassium ions (Na- K-ion) have emerged as promising alternatives to costly lithium-ion (Li-ion) batteries, offering a safer, more cost-effective, and sustainable solution for energy storage. Nonetheless, the practical application of these is hindered by significant challenge: low ionic conductivity most SEs designed Na- K-ion. Addressing this challenge, researchers turned covalent organic frameworks (COFs), category porous polymers characterized...
Epitaxial films of multiferroic BiFe1−xCoxO3 (BFCO) with 0≤x≤0.35 are grown on (001)-oriented SrTiO3 and SrRuO3 buffered substrates using the pulsed laser deposition technique. The effect structural transformation from rhombohedral to tetragonal phase increasing cobalt substitution magnetic, electrical, piezo-/ferroelectric properties is investigated. Piezoresponse force microscopy used quantify coercive voltage hysteresis loops for different thickness investigate semi-empirical Kay–Dunn...
The magnetic and transport properties of ${\mathrm{BiFeO}}_{3}/{\mathrm{La}}_{2}{\mathrm{NiMnO}}_{6}$ (BFO/LNMO) composite were investigated both experimentally theoretically. Unlike the normal rhombohedral $(R3c)$ phase, BFO in composites is crystallized triclinic phase $(P1)$. Interestingly, demonstrate a significant enhancement magnetization magnetoelectric coupling show higher resistivity than regular $(R3c)$. As LNMO has its Curie temperature at 280 K, room above contribution expected...
Since its discovery, the dye-sensitized solar cell (DSSC) technology with low-cost, simple fabrication procedure and promising photovoltaic (PV) performance remains a fertile research topic. Most DSSC is focused on TiO2, ZnO other binary metal oxides based photoelectrodes costly platinum (Pt) counter electrodes. However, overall of these traditional DSSCs still inadequate compared to standard PV technologies. The nanostructured perovskite (POs) their easily tunable interesting photophysical...
Here, we have discussed the charge transport phenomena through interface formed by silver and double perovskite oxide Dy2NiMnO6 (DNMO). The carrier mechanism in Ag/DNMO junction under dark illuminated conditions was analyzed on basis of thermionic emission theory metal-semiconductor junction. Schottky diode parameters like ideality factor, barrier potential height series resistance freshly fabricated device were evaluated conditions. results show significant improvements rectification ratio,...