Page 29 - CFM_Newsletter_CY22

studies were carried out and the solvatochromic studies is used to detect the charge transfer ability and
Aggregation Induced Emission (AlE) studies were used to enhance the fluorescence intensity due to the
mechanism of restricted intramolecular rotation by increasing the water fraction from 0-90%.

Synthesis and Characterization of Graphene Oxide Modified Lead-free Magneto-Electric Composite for
high- frequency Applications

Mr. Chinmay Chandan Parhi (20PHD0752), Research Scholar, VIT, Vellore, September 16 .
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Graphene oxide-modified magneto-electric composite consisting of cobalt nickel ferrite (CNF) and barium
zirconium titanate (BZT) is successfully synthesized by the conventional ceramic method using the
microwave sintering technique. X-Ray diffraction reveals the structural parameters of ceramic composite,
and a Scanning Electron Microscope (SEM) reveals the microstructural attributes of graphene oxide-
modified composites. UV spectroscopy and Fourier transform Infrared spectroscopy are used to estimate
the band gap energy and bond vibrational stretching of the composites. It assists in understanding the
effects of graphene oxide (GO) doping on the optical properties of the composite. Dielectric properties of
magnetic properties of composites are measured using an impedance analyzer and magnetic properties of
composites are estimated using VSM studies.

Properties of ZnO Nanoparticles Prepared by Solid state reaction Method

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Ms. Soniya Pauline G (19PHD0417), Research Scholar, VIT, Vellore, October 14 .
The talk discusses the synthesis and properties of ZnO nanoparticles. Thin film technology is a mature field
encompassing a wide range of applications such as electronics, optical communications and biosystems.
The list of potential applications is practically endless, impacting nearly every industrial sector. Many thin
film applications are linked to developments in the semiconductor industry and forming DMS materials is of
recent interest. A synthesis method of preparing ZnO nanoparticles and the thin film follows Solid State
Reaction and electron beam evaporation methods, respectively, to find its properties as DMS material.

Synthesis and Characterization on undoped and doped CdO nanoparticles and thin films
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Mr. Arcot Jaswanth (19PHD0498), Research Scholar, VIT, Vellore, November 25 .
The discussion was focused on the synthesis and characterization of CdO nanoparticles and thin films. The
evolution of thin film technology, supported by the development of vacuum technology has a wide range of
applications in optical communications, electronics etc., A synthesis method of preparing CdO
nanoparticles and thin film by Solid State Reaction and electron beam evaporation method respectively and
to find its properties.

A Novel Approach for Designing Sub Bandgap in CuGa(S,Te)2 Thin Films Assisted with Numerical
Simulation of Solar Cell device for the Photovoltaic Application

Mr. Vijayan K (19PHD0310), Research Scholar, VIT, Vellore, December 16 .
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Mr. Vijayan discussed the intermediate band formation in CuGa(S,Te)2 thin films with the incorporation of
Fe ions. The electrical studies showed the enhancement in mobility from 1.181 to 1.473 cm V s and
2 -1 -1
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conductivity from 2.182 to 5.952 S cm for pure and 0.08Fe substituted thin films. The I-V curves display
the photo-response and ohmic nature of the deposited thin films, and the maximum photoresponsivity
(0.109AW ) was observed for 0.08 Fe substituted film. The theoretical simulation of the prepared solar cells
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was carried out using SCAPS - 1D software, and the obtained efficiency displayed an increasing trend from
6.14%-11.07% as the Fe concentration increased from 0.0-0.08.

CFM Newsletter Jan. – Dec. 2022 29 Vol – 2