Pulsed electrodeposition of Cu2ZnSnS4 absorber layer precursor for photovoltaic application

Chaudhari, S and Palli, S and Kannan, P K and Dey, Suhash Ranjan (2016) Pulsed electrodeposition of Cu2ZnSnS4 absorber layer precursor for photovoltaic application. Thin Solid Films, 600. pp. 169-174. ISSN 0040-6090

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Cu2ZnSnS4 (CZTS), comprising of earth abundant and non-toxic elements, is an ecofriendly and cost effective thin film absorber layer for solar cell applications. The present work describes the fabrication of p-type absorber material Cu2ZnSnS4 (CZTS) from alkaline pyrophosphate solution through pulsed electrodeposition (PED) at room temperature. CZTS thin film is prepared from one step co-electrodeposited Cu-Sn-Zn (CZT) precursor film obtained from pyrophosphate bath under potentiostatic condition (− 1.4 V) onto a Ni substrate followed by annealing in sulfur atmosphere at 500 °C for 1 h 30 min. To achieve the desired CZTS stoichiometry in the deposited material, applied potential for the co-deposition has been calculated from the Tafel plots. The crystallographic phases, morphology and composition of the electrodeposited Cu-Sn-Zn precursor and the sulfurized films are assessed through X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), respectively. Formation of CZTS phase is confirmed from X-ray diffraction and Raman Spectroscopy of the sulfurized sample. Optical band gap measurement is investigated by using UV–Vis absorption spectroscopy. The CZTS thin film of kesterite structure is obtained with band gap of 1.5 eV, which is suitable for solar cell fabrication.

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IITH Creators:
IITH CreatorsORCiD
Dey, Suhash Ranjanhttp://orcid.org/0000-0002-5148-9534
Item Type: Article
Uncontrolled Keywords: CZTS absorber layer; Solar cell; Pulsed electrodeposition
Subjects: Others > Metallurgy
Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 22 Jan 2016 04:07
Last Modified: 07 Sep 2017 07:22
URI: http://raiith.iith.ac.in/id/eprint/2143
Publisher URL: https://doi.org/10.1016/j.tsf.2016.01.021
OA policy: http://www.sherpa.ac.uk/romeo/issn/0040-6090/
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