Enhanced photoresponse of Cu(In,Ga)Se2 /CdS heterojunction fabricated using economical non-vacuum methods

Mandati, S and Bulusu, V S and Dey, Suhash Ranjan and Joshi, S V (2015) Enhanced photoresponse of Cu(In,Ga)Se2 /CdS heterojunction fabricated using economical non-vacuum methods. Electronic Materials Letters, 11 (4). pp. 618-624. ISSN 2093-6788

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The present study demonstrates the fabrication of a CIGS/CdS heterojunction with enhanced photoelectrochemical performance using low-cost non-vacuum methods. A simplified economical pulse electrodeposition technique, with a two-electrode system in an additive-free electrolyte, has been used for the preparation of chalcopyrite Cu(In,Ga)Se2 (CIGS) thin-films avoiding the selenization process and CdS subsequently chemical bath deposited onto these CIGS films. Photoelectrochemical (PEC) performance of bare CIGS and the CIGS/CdS heterojunction has been investigated in conventional Na2SO4 electrolyte under chopped solar simulated light. The PEC analysis reveals nearly twenty-fold increase in the photoresponse of the CIGS/CdS heterojunction compared to bare CIGS films. The CIGS/CdS junction has also been tested in a PEC cell using a novel sulphide/sulphite electrolyte for the first time and found to yield further enhancement in photocurrent density with exceptional stability. Thus, apart from fabrication of an efficient CIGS/CdS heterojunction economically, the present study proposes use of a novel electrolyte yielding superior performance and showing potential for commercialization of CIGS devices and their use in photoelectrochemical cells.

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IITH Creators:
IITH CreatorsORCiD
Dey, Suhash Ranjanhttp://orcid.org/0000-0002-5148-9534
Item Type: Article
Uncontrolled Keywords: Cu(In,Ga)Se2 thin-films, pulsed electrodeposition, CIGS/CdS heterojunction, photocurrent, solar energy materials,
Subjects: Others > Metallurgy
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 11 Aug 2015 06:02
Last Modified: 07 Sep 2017 08:57
URI: http://raiith.iith.ac.in/id/eprint/1836
Publisher URL: https://doi.org/10.1007/s13391-014-4387-9
OA policy: http://www.sherpa.ac.uk/romeo/issn/2093-6788/
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