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Name Siddartha Srinivasan Nandagopala Krishnan
Registered 2015
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Academic Background[edit | edit source]

Presently, pursuing master's program in Industrial Metallurgy at PSG College of Technology, India. I am woking under the guidance of Dr.R.Balasundaraprabhu and Dr.R.Subramanian for my master's thesis. My topic is on studying the various properties of the RF Sputtered CIGS thin film absorber layer for solar cell applications on the flexible metal substrates. My research interests include advanced materials, photovoltaics, characterization, mathematical modelling and thin film technology. I have worked in ARCI, one of the India's finest research centre for advanced materials, under the supervision of Dr.K.Murugan. My undergraduate thesis was on the study of improving the electrical properties of ZnO by doping Lithium to it, which was also under the guidance of Dr.R.Subramanian. I have also worked in PSG Institute of Advanced Studies in my undergraduate level.


Presentations[edit | edit source]

  1. A paper on "Annealing Effects of RF Sputtered CIGS Thin Films" in an international conference (ICSET 2014) held at PSG College of Technology, 2014.
  2. A paper on "In-Situ Casting of Fe3Al in Pure Aluminium and its characterization" in an international conference (RAMP'11) held at PSG College of Technology, 2011.

Master's Research Thesis[edit | edit source]

Abstract

Copper Indium Gallium selenide (CIGS) has attracted significant research interest as an absorber layer thin films in solar cell applications. When compared the ternary CIS, the quaternary CIGS has more desirable and tunable optical band gap. Earlier works on CIGS have suggested that the desirable stoichiometry of CIGS is expected to be CuIn0.7Ga0.3Se2 for the fabrication of high efficient CIGS based solar cells. Therefore in the present study to achieve the desirable composition, CIGS thin films were deposited on the soda lime glass substrate and also on flexible metal substrates using sequential sputtering from CuIn0.2Ga0.8 and CuIn0.8Ga0.2 sputter targets followed by selenization process using close spaced sublimation.


As of now, we have successfully fabricated the CIGS thin film on glass substrate by annealing the as deposited films at 6000C and the preliminary studies has confirmed the formation of CIGS. Currently, we are characterizing the optical and morphological properties of the CIGS thin films that we have developed and simultaneously we are optimising the deposition parameters of CIGS thin films on the flexible metal substrate.


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