Fabrication of CuInSe2 and Cu(In,Ga)Se2 Absorber Layers by Pulse- and Pulse-reverse Electrochemical Techniques for Solar Photovoltaic Applications

Mandati, S (2015) Fabrication of CuInSe2 and Cu(In,Ga)Se2 Absorber Layers by Pulse- and Pulse-reverse Electrochemical Techniques for Solar Photovoltaic Applications. PhD thesis, Indian Institute of Technology Hyderabad.

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Abstract

Global energy crisis is one of the major concerns of the humankind due to the limited availability of fossil fuels which accomplish dominant portion of present days‟ energy. Hence, the need to develop renewable energy resources has come to the forefront of discussion. Solar photovoltaic is one of the major alternatives for future energy harvesting system; however, the utility of this emerging technology depends on the efficiency of the solar cell and viable techniques to commercialize it. Though silicon based photovoltaic technology is the most dominant till date but expensive manufacturing techniques pertaining to it is a major concern. In this context, chalcopyrite Cu(In,Ga)Se2 (CIGS) thin-film technology has already witnessed high conversion efficiencies due to its suitable bandgap (≈ 1.20 eV) and large optical absorption coefficient (≈ 105 cm-1). The highly efficient CIGS devices are often fabricated using expensive vacuum based technologies; however, efforts to seek an economical and scalable method for the production of stoichiometric CIGS thinfilms have been ongoing to realize the commercialization of these devices. In pursuit of this, electrodeposition has been demonstrated to produce CIGS devices with high efficiencies and it is easily amenable for achieving large area films of high quality with efficient material utilization and high deposition rate. The use of multi-steps, complexing agents, organic additives during the deposition using a three-electrode system followed by a conventional selenization step have often been employed to achieve chalcopyrite compact CIGS which make the process more complex and expensive.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (PhD)
Additional Information: I acknowledge the Department of Science and Technology, Govt. of India and the Indo-U. S. Science and Technology Forum, for selecting me for the prestigious Bhaskara Advanced Solar Energy internship award thereby providing an opportunity to work at Prof. Rakesh Agrawal‟s solar energy research laboratory, Purdue University, USA.
Uncontrolled Keywords: TD324
Subjects: Others > Metallurgy
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Library Staff
Date Deposited: 31 Mar 2015 09:48
Last Modified: 10 Jul 2015 06:06
URI: http://raiith.iith.ac.in/id/eprint/1413
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