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Photoelectrochemistry of Cu(In,Ga)Se2 thin-films fabricated by sequential pulsed electrodeposition
2015 (English)In: Journal of Power Sources, Vol. 273, 149-157 p.Article in journal (Refereed) Published
Abstract [en]

A novel approach for the fabrication of compact stoichiometric copper indium gallium selenium (CIGS) thin-films is reported. It uses a solution of CuCl2, GaCl3 and H2SeO3, pH adjusted with HCl with LiCl as additive employing a high purity graphite plate anode and Mo sputtered glass cathode during a simplified sequential pulsed current electrodeposition which avoids impurities from the use of a reference electrode during deposition and a separate selenization step. A Cu-Ga-Se film is optimally deposited by optimizing the deposition voltage, followed by deposition of In from InCl3 solution, and then annealing of the Cu-Ga-Se/In thin-film in an Argon atmosphere at 550 °C. A single phase chalcopyrite CIGS forms with a compact morphology and well-controlled composition of individual elements. The flat-band potential and carrier density of CIGS thin-films are -0.15 V and 2.6 × 1016 cm-3, respectively, as determined by Mott-Schottky studies. The photoelectrochemical performance of CIGS films shows a photocurrent density of -0.8 mA cm-2 at -0.4 V vs. SCE, an eight fold increment compared to our previous reported value. This simplified preparation using pulse plating gives superior quality CIGS films which are promising for application in thin-film solar cells and photoelectrochemical cells. © 2014 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 273, 149-157 p.
Keyword [en]
Cu(In, Ga)Se2 thin-films, Photocurrent, Photoelectrochemical cells, Pulsed current, Sequential electrodeposition, Cu (in, ga)se, Photo-electrochemistry, Pulsed currents, Pulsed electrodeposition, Photocurrents
National Category
Other Materials Engineering
URN: urn:nbn:se:hv:diva-8477DOI: 10.1016/j.jpowsour.2014.09.036ISBN: 03787753 (ISSN)OAI: diva2:859834
Available from: 2015-10-08 Created: 2015-10-08 Last updated: 2016-02-15Bibliographically approved

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Joshi, Shrikant V.
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