Search results for: Animesh Layek

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Structure, spectra and electrical conductivity of copper(I) and silver(I) phosphino bridging mixed ligand complexes with coumarinyl Schiff base

Suman Roy, Tapan Kumar Mondal, Animesh Layek, Rajat Saha, more

Inorganica Chimica Acta > 2018 > 469 > C > 523-535

Coordination polymers, [–M(L)(μ-dppp/dppb/dpph)–]_n(X)_n, (M=Cu(I), Ag(I); L, N-{(2-pyridyl)methyliden}-6-coumarin; X=NO₃⁻ or ClO₄⁻; dppp, 1,3-bis(diphenylphosphino)propane; dppb, 1,4-bis(diphenylphosphino)butane; dpph, 1,6-bis(diphenylphosphino)hexane) have been spectroscopically characterised and one of the complexes, [–Ag(L)(μ-dpph)–]_n(NO₃)_n has been structurally supported by single crystal X-ray...

article

Application Possibility of Mn_0.04Cu_0.05Zn_0.91O in Electronic and Magnetic Devices

Joydeep Datta, Arka Dey, Swarup K. Neogi, Mrinmay Das, more

IEEE Transactions on Electron Devices > 2017 > 64 > 11 > 4724 - 4730

In this literature, we have investigated the magnetic properties and Schottky device-based charge transport properties of hydrothermally derived Mn_0.04Cu_0.05Zn_0.91O nanorod. The doping of 3-D transitional metals, Mn and Cu, within ZnO makes it potentially applicable in spin-based electronics, whereas its temperature-dependent conductivity (of the order of 10⁻³ in C.G.S.) makes it suitable for semiconductor-based...

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Aggregation induced emission enhancement (AIEE) of fluorenyl appended Schiff base : A turn on fluorescent probe for Al3+, and its photovoltaic effect

Uttam Panda, Suman Roy, Debashis Mallick, Animesh Layek, more

Journal of Luminescence > 2017 > 181 > C > 56-62

Fluorenyl-diformyl phenol Schiff (HL) base is spectroscopically characterized and demonstrates aggregation induced emission enhancement (AIEE) upon addition of water to THF solution. Maximum intensity is observed at 90% of water addition at 570nm. Al³⁺ induced turn-on fluorescence enhancement is observed at 600nm and the limit of optical detection (LOD) is 6.22x10⁻⁹M. Isolation of Al(III)-complex...

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Growth of hierarchical strontium incorporated cadmium sulphide for possible application in optical and electronic devices

Joydeep Datta, Animesh Layek, Mrinmay Das, Arka Dey, more

Journal of Materials Science: Materials in Electronics > 2017 > 28 > 2 > 2049-2061

In this work, we have incorporated strontium (Sr) into cadmium sulphide (CdS) complex to explore its effect on optical and electrical properties. In this regard Sr composited CdS and a bared CdS were prepared by hydrothermal technique. X-ray diffraction pattern of the materials were analyzed to obtain their crystalline structure, size and internal lattice strain. The compositional details were obtained...

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Investigation of Light Induced Carrier Transport Phenomena Through ZnCdS Nanocomposite Based Schottky Diode

Mrinmay Das, Somnath Middya, Joydeep Datta, Arka Dey, more

Journal of Electronic Materials > 2016 > 45 > 8 > 4293-4301

Here, we have discussed the electron transport phenomena through the interface formed by aluminium and hydrothermally synthesized Zinc-Cadmium-Sulphide (ZnCdS) nanocomposite. In this background, the structural, optical, and electrical characterization of the synthesized material were studied. The estimated optical band gap energy (=3.14 eV) and the room temperature conductivity (1.6 × 10⁻⁶ S cm⁻¹)...

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Light induced charge transport property analysis of nanostructured ZnS based Schottky diode

Arka Dey, Somnath Middya, Rajkumar Jana, Mrinmay Das, more

Journal of Materials Science: Materials in Electronics > 2016 > 27 > 6 > 6325-6335

In this report we have investigated the light sensing behavior and also discussed the induced charge transport phenomena through the junction made by aluminium and hydrothermally derived zinc-sulfide (ZnS). In this regards the structural, optical and electrical characterization of ZnS was performed well. The optical band gap energy (=3.68 eV) estimated from optical spectra and room temperature conductivity...

article

Temperature dependent growth of cadmium(II) oxide nanocrystals: studies on morphology based optical, electrical and dielectric properties

Shyamapada Shit, Animesh Layek

Journal of Materials Science: Materials in Electronics > 2016 > 27 > 4 > 3435-3442

Nanocrystalline cadmium(II) oxide were obtained by calcining a hydrated cadmium-organic hybrid precursor, (C₁₀H₂O₈)Cd₂·xH₂O, obtained by a chemical reduction method using cadmium acetate dihydrate, 1,2,4,5-benzenetetracarboxylic acid, and triethylamine. Calcined CdO at different temperature possess different morphology, revealed by field emission scanning electron microscope analysis. In this article,...

article

Study of resonance energy transfer between MEH-PPV and CuFeS2 nanoparticle and their application in energy harvesting device

Animesh Layek, Somnath Middya, Arka Dey, Mrinmay Das, more

Journal of Alloys and Compounds > 2014 > 613 > Complete > 364-369

In this work wide band gap semiconducting chalcopyrite CuFeS ₂ has been synthesized by hydrothermal technique. The optical and electro-chemical studies approved the semiconductor nature of the synthesized material with direct band gap 4.04eV and room temperature electrical conductivity (σ)=4.7×10 ⁻⁸ Scm ⁻¹ . We have explored the possible applicability of this material in conjunction...

article

Role of zinc oxide nanomorphology on Schottky diode properties

Somnath Middya, Animesh Layek, Arka Dey, Joydeep Datta, more

Chemical Physics Letters > 2014 > 610-611 > C > 39-44

Here, we present the solvothermal synthesis of surfactant guided rod and sphere like zinc-oxide (ZnO) nanoparticles and their application in ITO/ZnO/Al based Schottky diode. Morphology dependent device parameters like ideality factor, barrier potential and series resistance have been analyzed on the basis of charge transport phenomena. The effect of ZnO nanomorphology on device performance has been...

article

Synthesis of Nanocrystalline FeS2 with Increased Band Gap for Solar Energy Harvesting

Somnath Middya, Animesh Layek, Arka Dey, Partha Pratim Ray

Journal of Materials Science & Technology > 2014 > 30 > 8 > 770-775

In this paper, we have reported the synthesis of FeS ₂ of higher band gap energy (2.75 eV) by using capping reagent and its successive application in organic–inorganic based hybrid solar cells. Hydrothermal route was adopted for preparing iron pyrite (FeS ₂ ) nanoparticles with capping reagent PEG-400. The quality of synthesized FeS ₂ material was confirmed by X-ray diffraction,...

article

Synthesis of ZnO composited TiO2 nanoparticle and its application in dye sensitized solar cells: A novel approach in enhancing open-circuit voltage

Animesh Layek, Somnath Middya, Arka Dey, Mrinmay Das, more

Materials Letters > 2014 > 126 > Complete > 214-216

In this study, hydrothermal synthesis has been introduced to incorporate ZnO nanoparticle within TiO ₂ matrix by using PVP (polyvinylpyrrolidone) as a surfactant. Inclusion of ZnO within TiO ₂ –ZnO nanocomposite increases optical absorption and reduces optical energy band gap. Within this TiO ₂ –ZnO composite, recombination of photogenerated charge carrier reduces and carrier...

article

Star-shaped polyfluorene: Design, synthesis, characterization and application towards solar cells

Chanchal Chakraborty, Animesh Layek, Partha Pratim Ray, Sudip Malik

European Polymer Journal > 2014 > 52 > Complete > 181-192

The present manuscript reports the design, synthesis and characterization of three star-shaped polymers consisting of three different arylimides such as perylene (PR)-, naphthalene (NT)- and benzene (BZ) tetracarboxylicdiimide as core and polyfluorene (PF) as arms. Chemical structure of star-shaped polymers was aimed at broadening as much as possible their absorption profile. Arylimide cored star...

article

Increase in open circuit voltage by the incorporation of band gap engineered FeS₂ nanoparticle within MEHPPV solar cell

Animesh Layek, Somnath Middya, Partha Pratim Ray

Journal of Materials Science: Materials in Electronics > 2013 > 24 > 10 > 3749-3755

In this study we have synthesized and characterized FeS₂ nanoparticles with larger optical band gap (3.19 eV) and high thermal stability by hydrothermal route with capping reagent PEG 400. This high quality FeS₂ nanoparticle with higher band gap energy was applied as semiconducting acceptor in MEHPPV:FeS₂ nanoparticle based hybrid solar cells to improve the open circuit voltage. Variations in the...

article

Morphological impact of ZnO nanoparticle on MEHPPV:ZnO based hybrid solar cell

Somnath Middya, Animesh Layek, Arka Dey, Partha Pratim Ray

Journal of Materials Science: Materials in Electronics > 2013 > 24 > 11 > 4621-4629

In this study, we have synthesized semiconducting ZnO nanoparticles (NP) of different morphology in solvothermal route, by using different capping reagents and applied it as an acceptor in poly(2-methoxy-5(2-ethylhexyloxy)-phenylene-vinylene (MEHPPV):ZnO NP based hybrid photovoltaic devices. Material properties of ZnO NP of different morphology and the compositions were studied with the help of X-ray...

article

Deposition of device quality amorphous silicon and solar cell from argon dilution of silane

Animesh Layek, Somnath Middya, Partha Pratim Ray

Journal of Physics and Chemistry of Solids > 2012 > 73 > 11 > 1358-1361

In our present study hydrogenated amorphous silicon (a-Si:H) thin films and solar cells have been prepared in a conventional single chamber rf-PECVD unit from silane–argon mixture by varying radio frequency (rf) power densities from 6mW/cm ² to 50mW/cm ² . By optimizing the properties of the intrinsic material we have chosen a material which is deposited at 6mW/cm ² rf power...

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