A5016536526- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Photocatalysis Techniques
- Solid-state spectroscopy and crystallography
- 2D Materials and Applications
- TiO2 Photocatalysis and Solar Cells
- Optical properties and cooling technologies in crystalline materials
- Advanced Thermoelectric Materials and Devices
- Copper-based nanomaterials and applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Carbon and Quantum Dots Applications
- Nanoparticles: synthesis and applications
- Metal complexes synthesis and properties
- Luminescence Properties of Advanced Materials
- Advanced biosensing and bioanalysis techniques
- Transition Metal Oxide Nanomaterials
- Electrochemical Analysis and Applications
- Selenium in Biological Systems
- Graphene research and applications
- Graphene and Nanomaterials Applications
- Coconut Research and Applications
- Electrochemical sensors and biosensors
- Metal-Organic Frameworks: Synthesis and Applications
Mississippi State University
2021-2025
Defence Institute of Advanced Technology
2015-2022
Indian Institute of Science Education and Research Pune
2019-2021
Government of India
2016-2019
Ministry of Defence
2015-2019
Savitribai Phule Pune University
2019
Metal-halide perovskites have rapidly emerged as one of the most promising materials 21st century, with many exciting properties and great potential for a broad range applications, from photovoltaics to optoelectronics photocatalysis. The ease which metal-halide can be synthesized in form brightly luminescent colloidal nanocrystals, well their tunable intriguing optical electronic properties, has attracted researchers different disciplines science technology. In last few years, there been...
Bi3+ and Sb3+ doping (and codoping with lanthanides) in Cs2SnCl6 vacancy ordered perovskites Cs2MInCl6 (M = Na, K, Ag) double has been shown to open up new opportunities for solid state lighting. ns2 outer electronic configuration can tailor both optical absorption emission properties phosphor-converted light emitting diode (pc-LEDs) applications. Therefore, the s-electron dopants (Bi3+ Sb3+) act as sensitizers emitters. This is because dopant s-electrons contribute near band edges of host,...
Dye degradation study using anatase and rutile titania suggests maximum efficiency of about 88% phase for MB under short UV light however, the long was not more than 65% (anatase/ rutile/EBT).
Luminescence quenching by hole transport layers (HTLs) is one of the major issues in developing efficient perovskite light-emitting diodes (PeLEDs), which particularly prominent blue-emitting devices. While a variety material systems have been used as interfacial layers, origin such and type interactions between perovskites HTLs are still ambiguous. Here, we present systematic investigation luminescence CsPbBr
Bulk crystals of Sb3+-doped A2InX5·H2O (A = Cs, Rb; X Cl, Br) zero-dimensional (0D) perovskites exhibit a high photoluminescence (PL) quantum yield. Can we prepare their colloidal nanocrystals (NCs)? Such solution-processed will be useful for ink-based and thin-film technologies. Here, present facile route to synthesize Cs2InCl5·H2O NCs explore optical properties. Sb3+ ions with 5s2 outermost electrons yield intense (quantum 39%) green light emission. Temperature-dependent (6.5–300 K) PL...
Lead halide perovskites are extraordinary optoelectronic materials, but there issues related to their toxicity and instability. To overcome these issues, various lead-free being explored. Metal double perovskites, for example, Cs2AgSbCl6, in which two Pb2+ CsPbCl3 (or Cs2Pb2Cl6) replaced with one Ag+ Sb3+, provide both charge balanced stable 3D perovskite structures. Synthesis of such different compositions, sizes, solution processabilities still remains a challenge. The present...
A novel nano-hybrid using a small-band-gap CuSbSe<sub>2</sub> and wide-band-gap TiO<sub>2</sub> is formed <italic>via</italic> microwave thermal methods for efficient photocatalytic degradation of organic dyes.
Room temperature thermoelectric studies are reported herein of ternary hybrids fabricated by ex situ processing involving polyaniline (PANI), multiwalled carbon nanotubes (MWCNTs), and binary metal selenide nanoparticles (MSe NPs) such as CuSe, Ag2Se, In2Se3, Sb2Se3 synthesized using cyclohexeno-1,2,3-selenadiazole (SDZ) selenium precursor. The presence phase pure MSe NPs in was confirmed XRD analysis. FTIR analysis suggested a strong π–π interaction between PANI MWCNTs. Electrical...
Halide mixing is one of the most powerful techniques to tune optical bandgap metal-halide perovskites. However, halide has commonly been observed result in phase segregation, which reduces excited-state transport and limits device performance. While current emphasis lies on development strategies prevent it remains unclear how may affect even if purity maintained. Here, we study exciton pure mixed-halide 2D perovskites (PEA)2Pb(I1–xBrx)4. Using transient photoluminescence microscopy, show...
CISe NPs were successfully synthesized <italic>via</italic> extrusion of selenium from 1,2,3-selenadiazole. The effect various reaction parameters on the size and shape studied.
Novel titanium-dioxide-decorated silver indium diselenide nano-photocatalyst for enhancement in photocatalytic dye degradation efficiency of three different dyes, namely, MB, MO, and RhB.
The reaction of selenium dioxide, a mild oxidizing agent, leads to the initiation polymerization pyrrole. presence cadmium metal can generate CdSe/PPy nanocomposites however, without it, Se/ PPy composites have been isolated.
Present article focuses on the in-situ generated Ag/ZnO nano catalyst for effluent treatment. It is observed that synthesis of using starch as environment friendly surfactant resulted in plate like elongated Zinc Oxide nanoparticles.
Optoelectronic properties of organic–inorganic hybrid perovskites (ABX3) or metal halides are governed primarily by the B and X-site ions due to their electronic contribution band edge. The A-site cations do not directly participate in edge; instead, they stabilize crystal structures. Facilitating these contribute edge can enable an additional degree tunability expand opportunities beyond X ions. Here, we rationally employ different based on anilinium Sb3+-doped zero-dimensional (0D) indium...
Abstract Present article highlights synthesis of phase pure I, III, VI 2 and V, ternary selenides nanocrystals (NCs) using oleic acid oleyl amine capping agents. The AgInSe (AISe), Cu 3 SbSe CuSbSe (CSSe) NCs was executed by employing cyclohexeno‐1,2,3‐selenadiazole (SDZ) as Se precursor. current study is the first report describing use thermally labile organoselenium compound for such technologically important selenide NCs. Systematic formation AISe CSSe at different reaction time carried...
Avoiding use of environmentally hazardous reducing agents and surfactants like sodium borohydride, hydrazine hydrate, alkyl amines phosphines, the current article describes successful synthesis silver nanoparticles via green by employing coconut, Indian gooseberry (amla), almond mustard oils as capping well agents. The presence various fatty acids in such edible act through their carboxylic acid functionality control growth nanoparticles. A single step, simple synthetic method yielded which...
Lead-free novel n-type ternary nanohybrids were fabricated by blending separately synthesized, diamond like I-III-VI2 and I-V-VI2 (I-Cu, Ag, III-In, V-Sb, VI-Se) nanocrystals (NCs) in a multi-walled carbon nanotube (MWCNT) polyaniline (PANI) matrix. A thermoelectric study of these was performed at room temperature order to understand their utility as potential materials for advanced applications. Electrical conductivity, thermal conductivity Seebeck coefficient measured the performance...
The cytotoxicity of hydrophobic QDs CdS/CdSe was tested assigning MTT assay on Human Embryonic Kidney cells (HEK-293), breast cancer (MCF-7) and Enrichlish Ascitices Cells (EAC). Approximately 65% bio-toxicity observed in MCF-7 for the core-shell QDs. These may also find effective applications other optoelectronic devices. hetrostructure quantum dots (QDs) were generated by chemical reaction between respective chalcogens cadmium metal salt. Sulphur powder utilized CdS core preparation while...
Present article describes, synthesis of polyvinyl pyrrolidone (PVP) capped CdSe quantum dots (QDs) at pH 5, 7 and 9 under controlled atmosphere. Spherical QDs in the size domain 2 nm to 10 revealed cubic crystal structure from XRD analysis. The synthesized showed highest specific surface area as compared those 5 9. photocatalytic activity was investigated against methylene blue (MB) aqueous solution different concentrations (5, 20 ppm) irradiation mild visible light (8 W lamp). Maximum 64%...
Abstract First report on copper (II) complexes (Cu (II)) of unsubstituted cyclic aliphatic semicarbazones is presented. Copper with semicarbazone derivatives cyclopentanone (C5), cyclohexanone (C6), cycloheptanone (C7) and cyclooctanone (C8) are synthesized characterized by physico‐chemical techniques such as melting point, Ultra Violet‐Visible, Diffuse Reflectance (UV‐Vis‐DRS), Fourier Transform Infra Red (FTIR), FT‐Raman, proton nuclear magnetic resonance ( 1 HNMR) spectroscopy Mass...
Present article describes one-pot, two-stage, in-situ controlled atmosphere method for synthesis of core-shell quantum dots (QDs) comprising ZnSe, CdS and CdSe combinations e.g. CdS/CdSe, ZnSe/CdS ZnSe/CdSe. The present emphasizes on creating an effective surface passivation core as well formation passivated shell via utilization cyclo-octeno-1, 2, 3-selenadiazole a precursor selenium. Synthesis was compared by using two different selenium precursors viz (C8-SDZ) cyclo-hexeno-1, (C6-SDZ)....