Azad college

Ausa, India

Azad college

Ausa, India
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Rajbhoj A.S.,Dr. Babasaheb Ambedkar Marathwada University | Korde N.S.,Dayanand Science College | Gaikwad S.T.,Dr. Babasaheb Ambedkar Marathwada University | Korde S.S.,Azad College
Der Pharma Chemica | Year: 2012

1-(5-chloro,2-hydroxyphenyl)-3-(4-ethoxyphenyl)propane-1,3-dione and its transition metal complexes have been synthesized by ultrasound irradiation method. The diketone is offered by employing Baker-Venkatraman rearrangement on 5-chloro, 2-acetylphenyl,4-ethoxy benzoate. The synthesized compounds were confirmed by the spectroscopic analysis such as IR, 1H-NMR, 13C-NMR, Mass, Elemental analysis, magnetic susceptibility and evaluated for antimicrobial screening.


Barote M.A.,Azad College | Yadav A.A.,Thin Film Research Laboratory | Suryavanshi R.V.,Azad College | Deshmukh L.P.,University of Solapur | Masumdar E.U.,Thin Film Research Laboratory
Materials Letters | Year: 2012

State-of-the-art, novel and inexpensive chemical deposition route was selected for the preparation of Cd 0.825Pb 0.175S thin films. Optimized deposition parameters were: time = 60 min, temperature = 80°C, speed of substrate rotation = 65 ± 2 rpm and pH = 10.5 ± 0.1. XRD analysis of polycrystalline Cd 0.825Pb 0.175S thin films revealed mixture of hexagonal and cubic phases. Morphological features rigorously define nucleation and subsequent growth of thin film layers. Detailed investigations on power output curves underline the boost in conversion efficiency from 0.184% to 0.245% with increase in layer thickness. Low conversion efficiency in the present case is attributed to the higher photoelectrode resistance and significant light absorption by the electrolyte. © 2012 Elsevier B.V. All rights reserved.


Barote M.A.,Azad College | Yadav A.A.,Thin Film Research Laboratory | Masumdar E.U.,Thin Film Research Laboratory
Thin Solid Films | Year: 2012

CdzPbyS thin films have been deposited on glass substrates using inexpensive chemical bath deposition technique. The aqueous solution containing precursors of Cd2 + and Pb2 + has been used to obtain good quality deposits at optimized preparative parameters. The thin film samples have been characterized through optical absorption, electrical conductivity and thermoelectric power measurement techniques. From optical studies, the absorption coefficient 'α,' is found to be of the order of 104 cm- 1. The optical absorption studies revealed direct band to band transition. The band gap energy is found to vary nonlinearly from 2.47 eV (CdS) to 0.49 eV (PbS) as the composition parameter 'x' was increased from 0 to 1. The electrical characterization revealed increased conductivity (σ) with the increased composition parameter up to x = 0.175. The electrical conductivity measurements indicate two types of conduction mechanism, namely grain boundary scattering limited and variable range hopping conductions. The activation energies of the films of different compositions were determined at low and high temperature regions. The activation energies were observed to be in the range of 0.168-0.240 eV and 0.514-0.711 eV respectively. Thermoelectric power measurements highlighted n-type behavior of the as-grown thin film samples. © 2012 Elsevier B.V.


Barote M.A.,Azad College | Deshmukh L.P.,University of Solapur | Masumdar E.U.,Thin Film Research Laboratory
Ceramics International | Year: 2013

This paper discusses chemical synthesis of Cd1-xPbxS (0≤x≤1) thin film layers and their photo-electrochemical properties with special reference to PEC parameters. Previously optimized conditions were used for the deposition. The electrode/electrolyte interfaces were then formed between the Cd1-xPbxS thin film layers and a sulphide/polysulphide (1 M) redox couple and investigated through the various photo-electrochemical (PEC) properties to assess suitability to convert solar energy into electrical energy. Increase in short circuit current (I sc) and open circuit voltage (Voc) was observed with increased composition and attain maximum at x=0.175. Power conversion efficiency and fill factor were found to be 0.163% and 46.2% respectively for the composition parameter x=0.175. © 2012 Elsevier Ltd and Techna Group S.r.l.


Barote M.A.,Azad college | Yadav A.A.,Thin Film Research Laboratory | Chavan T.V.,Thin Film Research Laboratory | Masumdar E.U.,Thin Film Research Laboratory
Optoelectronics and Advanced Materials, Rapid Communications | Year: 2011

Lead sulphide thin films have been deposited on amorphous and fluorine doped tin oxide (FTO) coated glass substrates using simple and inexpensive chemical bath deposition technique. The reactive substances used to obtain the PbS thin films were lead sulphate, thiourea and sodium hydroxide. Triethanolamine (TEA) was used as a complexing agent. The 'as-deposited' films were characterized for structural, morphological, compositional, optical, electrical and photoelectrochemical (PEC) properties. The X-ray diffraction (XRD) studies reveal that the films are polycrystalline in nature with cubic phases. The energy dispersive analysis by X-ray (EDAX) shows that films are Pb rich. The surface morphology and crystallite size were determined by scanning electron microscope measurements. The optical studies were carried out from spectroscopy measurements in the wavelength range 350-3300 nm. The band gap energy is estimated as 0.49 eV. The film shows n-type conduction mechanism. The photoelectrochemical cell with PbS film as a photo anode and sulphide-polysulphide (1M) solution as an electrolyte is constructed and investigated for various cell parameters. The solar to electrical conversion efficiency (η) and fill factor (FF) are found to be 0.041 % and 36.8% respectively.


Barote M.A.,Azad college | Yadav A.A.,Thin Film Research Laboratory | Masumdar E.U.,Thin Film Research Laboratory
Chalcogenide Letters | Year: 2011

A Simple and cost effective chemical bath deposition process has been employed for the preparation of Cd1-xPbxS (x = 0.00, 0.20, 0.40, 0.60, 0.80, 1.00) thin films. Cadmium sulphate, lead sulphate and thiourea were used as the basic source materials. The effect of various preparative parameters such as bath composition, pH of the reaction solution, deposition temperature and time, speed of the substrate rotation and the complexing agent on growth process is studied and these parameters are optimized for good quality films. The colour of the 'as-deposited' thin films has changed from orange yellow to black as the composition parameter x changed from 0 to 1. The film thickness is found to be increased with increasing the composition parameter x from 0 to 1. The X-ray diffraction (XRD) studies revealed that films are polycrystalline in nature and exhibit both cubic and hexagonal structure for pure CdS but only cubic phases for pure PbS film. The energy dispersive analysis by X-rays (EDAX) studies revealed that films are cadmium rich. The energy band gap is decreased from 2.47 eV to 0.49 eV as composition parameter 'x' is increased from 0 to 1.


Masumdar E.U.,Thin Film Physics Laboratory | Barote M.A.,Azad college
Sensors and Transducers | Year: 2012

The present work deals with the effect of nozzle to substrate distance on structural, morphological and optical properties of nanocrystalline zinc oxide thin films deposited by chemical spray pyrolysis technique. The XRD analysis revealed that all the films are polycrystalline and are preferentially oriented along (002) plane. This study further the grain structure has considerably improved at nozzle to substrate distance of 28 cm. The morphological observations supported well about importance in grain size with changing nozzle to substrate distance and revealed an average particle size 250 nm. Further, analysis of optical data indicated that the band gap of ZnO films is lying in the range of 3.32 eV to 3.19 eV and found to be dependent of nozzle to substrate distance. © 2012 IFSA.


Barote M.A.,Azad college | Masumdar E.U.,Thin Film Physics Laboratory
Sensors and Transducers | Year: 2012

Nanocrystalline, uniform, dense, and adherent cadmium oxide (CdO) thin films have been successfully deposited by a simple and cost effective spray pyrolysis technique. The effect of deposition temperature (250-350 0C) on structural, compositional, morphological, and optical properties of CdO thin films were studied by X-ray diffraction (XRD), Energy Dispersive Analysis by X-rays (EADX), Scanning Electron Microscopy (SEM), and UV-visible Spectroscopy (UV-vis). X-ray diffraction characterization of as-deposited CdO thin films reveals that films are of cubic structure with a (111) preferred orientation. The crystalline quality of the CdO films improves and the grain size increases with deposition temperature. These modifications influence the optical properties. The SEM images confirmed these results and showed larger grains and more crystallization for the higher deposition temperature. It has been determined that Cd and O elements are present in the solid film by using EADX. Increase in deposition temperature increased the optical transmission of the films substantially. The optical properties revealed the presence of direct band gaps with energies varied from 2.46 to 2.38 eV. © 2012 IFSA.


Barote M.A.,Azad College | Yadav A.A.,Thin Film Physics Laboratory | Masumdar E.U.,Thin Film Physics Laboratory
Physica B: Condensed Matter | Year: 2011

Cadmium sulfide thin films have been deposited on glass substrates by simple and cost effective chemical bath deposition technique. Triethanolamine was used as a complexing agent. The preparative parameters like ion concentration, temperature, pH, speed of substrate rotation and deposition time have been optimized for good quality thin films. The 'as-grown' films are characterized for structural, electrical, optical and photoelectrochemical (PEC) properties. The X-ray diffraction (XRD) studies reveal that the films are polycrystalline in nature. Energy-dispersive analysis by X-ray (EDAX) shows that films are cadmium rich. Uniform deposition of CdS thin films on glass substrate is observed from scanning electron microscopy (SEM) and atomic force microscopy (AFM) micrographs. Optical studies reveal a high absorption coefficient (104 cm-1) with a direct type of transition. The band gap is estimated to be 2.47 eV. The film shows n-type conduction mechanism. The photoelectrochemical (PEC) cell with CdS thin film as a photoanode and sulfide/polysulfide (1 M) solution as an electrolyte have been constructed and investigated for various cell parameters. The solar to electrical conversion efficiency (η) and fill factor (ff) are found to be 0.049% and 0.36, respectively. © 2011 Elsevier B.V. All rights reserved.

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