A5103103813- Perovskite Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Chalcogenide Semiconductor Thin Films
- Biomedical and Engineering Education
- Biotechnology and Related Fields
- Conducting polymers and applications
- Atomic and Molecular Physics
- 2D Materials and Applications
- Solid-state spectroscopy and crystallography
- Graphene research and applications
- Science, Research, and Medicine
- Nanotechnology research and applications
- Advanced Photocatalysis Techniques
- Bacterial biofilms and quorum sensing
- Global Health Workforce Issues
- Leprosy Research and Treatment
- Antimicrobial Resistance in Staphylococcus
- Microbial Metabolism and Applications
- Lubricants and Their Additives
- Molecular Communication and Nanonetworks
- Salmonella and Campylobacter epidemiology
- Optical properties and cooling technologies in crystalline materials
- Advanced Nanomaterials in Catalysis
Indian Institute of Technology Roorkee
2022-2025
Iowa State University
2024
Manipal-Tata Medical College, Jamshedpur
2024
Indian Institute of Technology Delhi
2024
Institute of Medical Sciences
2024
Maharaja Agrasen University
2023
ELI-HU Research and Development Non-Profit
2022
Mannheim University of Applied Sciences
2021
Birla Institute of Technology and Science, Pilani
2016-2019
Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya
2019
We report on the preparation of alkylated graphenes a large scale followed by their dispersion in organic solvents. The with variable alkyl chain lengths (Cn = 8, 12, 18) are prepared coupling alkylamine carboxylic groups graphene oxide (GrO). FTIR, UV-Visible, and TGA results reveal that, during alkylation, oxygen functionalities GrO reduced significantly average size sp2 carbon domain increased, which is further supported Raman characteristics. It observed that dispersibility hydrocarbon...
Abstract There is currently substantial interest in commercializing perovskite solar cells as they offer superior properties over silicon-based cells, such ability for bandgap tuning, higher absorption coefficients, and potentially lower manufacturing costs. However, trap states originating from ionic vacancies, imperfect interfaces, grain boundaries have hampered their performance long-term stability during operation. Identifying quantifying defects becomes inevitable to address these...
The recent advances in lead-free perovskites (LFP) for solar cell applications have been discussed and their properties are compared with lead-based perovskites. In addition, reasons low efficiency of LFP comprehensively discussed.
Abstract Semi‐transparent perovskite solar cells (ST‐PSCs) are promising for their application in building integrated photovoltaics (BIPVs). For BIPVs, a light utilization efficiency (LUE) > 2.5 is required which multiplication of average visible transmittance (AVT) and power conversion (PCE). Generally, semitransparency achieved by reducing film thickness increases AVT but decreases PCE resulting lower LUE. Here, an interface engineering strategy employed on wide bandgap thin absorber...
Semitransparent perovskite solar cells (ST-PSCs) have emerged as an exciting prospect due to their applications in future smart buildings. Semitransparency is typically realized through the use of wide bandgap materials with a reduced thickness. In this study, we demonstrate methylammonium (MA)-free for active layer ST-PSCs. However, achieving defect-free highly crystalline films lower film thickness has been challenging. We report precursor engineering approach based on organic ammonium...
Slowing hot carrier (HC) cooling in halide perovskites emerges as an efficient strategy to enhance the power conversion efficiency (PCE) of perovskite solar cells (PSCs). This approach facilitates rapid extraction HCs before they dissipate within intricate lattice structure. In this investigation, we delve into impact amine-based additives on relaxation using a diamine 4,4′-diaminodiphenylmethaneiodide salt (MDA). The has been used situ additive precursor. ultrafast femtosecond transient...
In this study, we investigate how modulating organic spacers in perovskites influences their X-ray detection performance and reveal the mechanism of low-dose with high sensitivity using femtosecond-transient absorption spectroscopy (fs-TAS). Particularly, employ N,N,N',N'-tetramethyl-1,4-phenylenediammonium (TMPDA) N,N-dimethylphenylene-p-diammonium (DPDA) as to synthesize 2D perovskite single crystals (SCs). We find that DPDA-based SCs exhibit reduced interplanar spacing between inorganic...
Abstract A green and facile approach for the partial deoxygenation of graphene oxide (GO) at moderate temperature (100 °C) under atmospheric pressure, catalyzed by acidic conditions in water is reported. The chemical structural changes GO as a function hydrothermal time were probed to understand events. brown dispersion was found gradually turn black over hydrothermal‐treatment on account increasing graphitic content. FTIR, thermogravimetric (TG), Raman, XRD analyses revealed that labile...
Transition metals are renowned for their effective catalytic properties. Incorporating transition into halide perovskite derivatives is a key strategy tuning the properties of perovskites to enhance photocatalytic performance. Understanding d-orbital occupancy and spin activity these in CO2 photoreduction process essential fully realizing potential materials. In this study, layered synthesized using cobalt (Co) copper (Cu) as metal components. We observed that Cu Co exhibit complementary...
Perovskite solar cells (PSCs) is of the emerging photovoltaic (PV) technology that undergoing rapid development at lab scale with a certified power conversion efficiency (PCE) 26.7%. The solution...
Passivation of defects with functional organic molecules is one the best strategies to improve efficiency and stability perovskite solar cells (PSCs). Herein, two fluorinated additives have been utilized passivate CH3NH3PbI3 film study their effects on PSC device performance. The additives, pentafluoropropionic acid (PFPA) heptafluorobutanoic (HFBA), contain a single carboxylic varying fluoro groups. interaction these was first confirmed by density theory X-ray photoelectron spectroscopy,...
Introduction: Leprosy is a chronic infectious disease involving skin and peripheral nerves certain other tissues. It classified into five groups based on clinical, histopathological, bacteriological criteria tuberculoid (TT), borderline (BT), mid-borderline (BB), lepromatous (BL), (LL) according to Ridley-Jopling classification. Clinical classification gives recognition only the gross appearance of lesions, while histopathological parameters are well-defined precise thus, it provides...
The distinctive surface states of Bi2Se3, recognized as topological insulators, have garnered considerable attention for their phenomenal electronic and optical characteristics. Heterostructures (HS) integrating Bi2Se3 emerged viable prospects a variety applications despite hurdles such attaining high-quality interfaces, complicated fabrication processes, maximizing optoelectronic performance. synergistic coupling halide perovskite materials provides potential variable bandgaps improved...
Herein, the emission characteristics of diammonium N,N,N',N'-tetramethyl-1,4-phenylenediammonium (TMPDA) are investigated based on lead iodide (TMPDA)PbI
Abstract In this study, the investigation of a Cs 2 AgBiBr 6 single crystal (SC) / CsPbBr 3 nanocrystals (NCs) film double perovskite/perovskite type‐II novel heterojunction tailored for superior X‐ray detection applications is presented. One main benefits utilizing such its built‐in electric potential, which improves charge transport and reduces dark current in devices. By casting NCs onto polished SC, /CsPbBr perovskite/ perovskite fabricated. The detector exhibits reduced increased...
The application of nanotechnology in the field biology and medical sciences is known as bionanotechnology. This technology gives rise to a new device system with greater sensitivity accuracy. important applications this study include synthesis molecules, selfless assembly structures from DNA, macromolecular science engineering mimics biological assembly, drug-delivery systems, therapeutic applications, biomolecular motors, bioelectronics, DNA computers, enabling technologies, etc. Finally,...
Ultrafast plasma dynamics play a pivotal role in the relativistic high harmonic generation, phenomenon that can give rise to intense light fields of attosecond duration. Controlling such holds key optimize relevant sub-cycle processes high-intensity regime. Here, we demonstrate optimal coherent combination two ultrashort pulses centered at two-colors (fundamental frequency, [Formula: see text] and second harmonic, text]) lead an shape intensity driver field yields extraordinarily sensitive...
We study the effect of chirped laser pulse on transmission and associated ion acceleration by sub-wavelength target. In pulses, frequency has a temporal variation about its fundamental frequency, which manifests to dependence critical density (nc). this work, we used chirp model is beyond linear approximation. For negatively (positively) high (low) component interacts with target initially followed low (high) component. The threshold plasma for found be higher pulses as compared unchirped or...