A5042021236- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Gas Sensing Nanomaterials and Sensors
- Perovskite Materials and Applications
- Radiation Detection and Scintillator Technologies
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Microwave Dielectric Ceramics Synthesis
- Transition Metal Oxide Nanomaterials
- Crystal Structures and Properties
- Carbon and Quantum Dots Applications
- Nuclear materials and radiation effects
- Chalcogenide Semiconductor Thin Films
- Ammonia Synthesis and Nitrogen Reduction
- Copper-based nanomaterials and applications
- Pigment Synthesis and Properties
- Ga2O3 and related materials
- Advanced Sensor and Energy Harvesting Materials
- Solid State Laser Technologies
- Graphene research and applications
- Caching and Content Delivery
- Graphene and Nanomaterials Applications
Academy of Scientific and Innovative Research
2019-2025
National Institute for Interdisciplinary Science and Technology
2018-2025
Indian Institute of Technology Kanpur
2024
Indian Association for the Cultivation of Science
2018-2022
National Taiwan University
2012-2021
Indian Institute of Technology Kharagpur
2021
Raja Ramanna Centre for Advanced Technology
2020
North Bengal University
2020
Indian Institute of Technology Dhanbad
2008-2016
Indian Institute of Technology Delhi
2011-2014
The mixture of persistent blue and deep red-emitting systems is suitable for currency QR code anti-counterfeiting due to the emission as plant growth lighting their overlapping with pigments’ absorption.
A comparative investigation on the structural and photoluminescence properties of Y<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup>phosphor prepared by different routes such as sol-lyophilisation, combustion, hydrothermal microwave assisted has been reported for first time.
Red emission from Mn4+-containing oxides inspired the development of high color rendering and cost-effective white-light-emitting diodes (WLEDs). Aiming at this fact, a series new crystallographic site modified (Mg, Ba)3M2GeO8: Mn4+ (M = Al, Ga) compositions were developed with strong deep-red in reaction to UV blue lights. The Mg3Al2GeO8 host is composed three phases: orthorhombic-Mg3Ga2GeO8, orthorhombic-Mg2GeO4, cubic-MgAl2O4. However, Mg3Ga2GeO8 secured an orthorhombic crystal structure....
This work investigates the important role of structural rigidity and defect related dynamics a promising garnet phosphor with robust thermal stability for efficient NIR pc-LED devices.
Sc 2 Mo 3 O 12 :Sm 3+ phosphor was explored for white LED with improved CRI and precise color coordinates indoor plant growth. The green emission of monoclinic phase at 80 K diminished on transition to the orthorhombic RT.
Alkali borate glasses activated with trivalent europium ions and rooted gold (Au) nanoparticles (NPs) were synthesised through a melt quenching process involving selective thermochemical reduction their applicability as photonic materials was assessed in detail. Non-linear optical (NLO) measurements performed using Z-scan approach the wavelength range of 700-1000 nm. The open aperture signatures for Eu3+-containing embedded without Au NPs established reverse saturable absorption (RSA) at all...
Focusing on the huge importance associated in developing functional materials, this research study describes synthesis, characterization of morphology, bactericidal activity and cytotoxic effect iron oxide nanoparticles (IONPs). IONPs have been successfully fabricated through thermal decomposition a diiron(III) complex precursor. The morphology nanoparticle has delineated with different spectroscopic analytic methods. Scanning transmission electron microscopy (FE-SEM HR-TEM) analyses...
Temperature-dependent photoluminescence to understand negative thermal quenching in Zn 2 GeO 4 , and Pr 3+ doping for trap tuning the enhanced formation of defect states leading ultralong (>18 h) X-ray persistent luminescence.
A series of Dy 3+ –Eu ‐codoped ZrO 2 nanocrystals with tetragonal and cubic symmetry was synthesized via a wet chemical reaction. When the Eu ‐doping content fixed, crystal structure could be stabilized from mixed phase to single by simply adjusting . The :Dy nanoparticles exhibited spherical nonagglomerated morphology. effective phonon energy :5%Dy –5%Eu calculated 445 cm −1 , which is lower than previously reported results. Extensive luminescence studies as function demonstrated that...
Novel red emitting KCaBO3:Eu phosphors have been synthesized by solid-state reaction at various temperatures. Systematic studies on annealing effects and consequent structural evolution optical properties were investigated photoluminescence studies. With an increase in temperature (from 700 °C to 950 °C), these show a gradual change from mixed low crystalline phase highly single phase, with minimized volatile impurities. Photoluminescence revealed that the low-temperature annealed showed...
Abstract This research is focused on the temperature sensing ability of perovskite SrZrO 3 :Eu 3+ hollow spheres synthesized via sol-gel method followed by heating. The Rietveld refinement indicated that precursors annealed at 1100 °C were crystallized to form orthorhombic . particles exhibited non-agglomerated spherical morphology with an average particle size 300 nm. UV-excited photoluminescence spectrum consisted two regions. One region was associated trap emission, and other one related...
Deep red emitting Y 2 Zr O 7 :Eu 3+ (YZOE) pyrochlore nanocrystals with very high color purity, excellent thermal stability and a photoluminescence quantum yield (∼88%) is synthesized for tunable white LEDs indoor plant growth.
Remarkable structural diversity-dependent photoluminescence and UV-vis absorption have been induced in Zn 3 V 2 O 8 through several cationic substitutions (In 3+ , Y Bi K + ), which ensured potential lighting pigment applications.
Abstract Red‐emitting nanophosphors have a multirole in improvising the next‐generation bulk/micro/nano‐level lighting devices, particularly refining white light quality and device performance. Nonetheless, it is difficult to synthesize nanosized phosphors with good yield paralleled high absorption efficiency both UV blue regions, which critical for modern lighting. Herein, new Mg 14 Ge 4.99+σ O 24‐x+δ F x : Mn 4+ red nanoparticles sizes below 100 nm are designed improve not only...