A5071665440- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Advanced Thermoelectric Materials and Devices
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Electrocatalysts for Energy Conversion
- 2D Materials and Applications
- Conducting polymers and applications
- Semiconductor materials and devices
- Topological Materials and Phenomena
- Microfluidic and Bio-sensing Technologies
- Diamond and Carbon-based Materials Research
- Microfluidic and Capillary Electrophoresis Applications
- Metal and Thin Film Mechanics
- Electrowetting and Microfluidic Technologies
- solar cell performance optimization
- Nanoporous metals and alloys
- Catalytic Processes in Materials Science
- 3D Printing in Biomedical Research
- Electrodeposition and Electroless Coatings
- Electrochemical Analysis and Applications
- ZnO doping and properties
- Organic Light-Emitting Diodes Research
University of Virginia
2017-2023
Charlottesville Medical Research
2021
McCormick (United States)
2018-2020
Queensland University of Technology
2012-2015
Bangladesh University of Engineering and Technology
2006-2008
ZnO is a promising photoanode material for dye-sensitized solar cells (DSCs) due to its high bulk electron mobility and because different geometrical structures can easily be tailored. Although various strategies have been taken improve ZnO-based DSC efficiencies, their performances are still far lower than TiO2 counterparts, mainly low conductivity Zn2+–dye complexes form on the surfaces. Here, cone-shaped nanocrystals with exposed reactive O-terminated {101̅1} facets were synthesized...
Research on development of efficient passivation materials for high performance and stable quantum dot sensitized solar cells (QDSCs) is highly important. While ZnS one the most widely used material in QDSCs, an alternative based ZnSe which was deposited CdS/CdSe/TiO2 photoanode to form a semi-core/shell structure has been found be more terms reducing electron recombination QDSCs this work. It that cell efficiency improved from 1.86% ZnSe0 (without coating) 3.99% using 2 layers coating...
Bi2Se3 was synthesized by a room-temperature deposition technique and successive ionic layer adsorption reaction (SILAR) method with the aim to understand formation, crystallinity, optical properties, energy band structure of this material. The morphology found change from nanoparticles that nanocluster network increasing SILAR cycles. crystalline as-prepared determined grazing-incidence X-ray diffraction (GI-XRD) pattern have mixed metastable orthorhombic rhombohedral phases which further...
Self-aligned sequential lateral field non-uniformities extending uniformly over the sample channel depth are fabricated using a single lithography step for enabling phenotype-specific dielectrophoretic separation of cells.
Abstract Microfluidic cell enrichment by dielectrophoresis, based on biophysical and electrophysiology phenotypes, requires that cells be resuspended from their physiological media into a lower conductivity buffer for enhancing force fields enabling the dielectric contrast needed separation. To ensure sensitive are not subject to centrifugation resuspension spend minimal time outside of culture media, we present an on‐chip microfluidic strategy swapping tailored dielectrophoresis. This...
Two different TiO2 compact films, fabricated by sol-gel spin-coating (SC) and spray-pyrolysis (SP) processes, were employed as an electron transport layer (ETL) to the nanostructured hybrid perovskite solar cells (PSCs), they comprehensively investigated through various characterisation approaches using electrochemical physicochemical approaches. With cyclic voltammetry XPS results, absence of pinholes on SP-TiO2 films was indicated, AFM SEM results confirmed had lower surface roughness more...
Abstract Gallium arsenide (GaAs) provides a suitable bandgap (1.43 eV) for solar spectrum absorption and allows larger photovoltage compared to silicon, suggesting great potential as photoanode toward water splitting. Photocorrosion under oxidation condition, however, leads decomposition or the formation of an insulating oxide layer, which limits photoelectrochemical performance stability GaAs. In this work, self‐limiting electrodeposition method Ni on GaAs is reported either generate...
Scalable energy conversion/storage by water splitting is significantly hindered the slow kinetics of oxygen evolution reaction (OER). Implementation electrochemical catalysts with low cost and high turn-over efficiency, or application a photoanode in photoelectrochemical (PEC) cell using semiconductor proper protection layer are two possible solutions. Herein, binary Iron-group alloy films (Ni-Co Ni-Fe) one ternary film (Ni-Co-Fe) under self-limiting deposition condition investigated...
The photocurrent density of CdS/CdSe-modified TiO2 photoanodes measured under standard test conditions were 0.94 mAcm-2 and 7.4 at 1.23 VRHE using 1 M NaOH electrolyte (no reagents) Na2S/Na2SO3-added (with reagents), respectively. actual current contribution in the case aqueous alkaline was due to water oxidation while 8-fold enhancement latter sulfite oxidation. A maximum Solar-To-Hydrogen (STH) efficiency 0.71% splitting 12.4% determined for photoelectrochemical cell. incident...
Chalcogenide materials are being considered as some of the most promising systems for energy harvesting and conversion. Among them, orthorhombic family compounds X2Y3 (with X = Bi, Sb Y S, Se) has attracted special attention due to its interesting atomic structure thermoelectric optical properties. While Bi2S3 Sb2Se3 have already been applied solar cells, practical application new metastable Bi2Se3 is still a challenge lack data knowledge on Here, vibrational structural properties phase...
The spectral photoresponse of nitrogen doped n-type amorphous carbon (n-C:N) films obtained from camphoric (C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> H xmlns:xlink="http://www.w3.org/1999/xlink">16</sub> O) target on single crystal Si (100) substrate at room temperature is investigated. Photoresponse analyses the were done, with different partial pressures (NPP) in range 0.3 to 50 mTorr, using curve fitting technique. was...