Record Details

Improved structural and optical properties of Cu2ZnSnS4 thin films via optimized potential in single bath electrodeposition

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Improved structural and optical properties of Cu2ZnSnS4 thin films via optimized potential in single bath electrodeposition
 
Creator ANANTHOJU, B
SONIA, FJ
KUSHWAHA, A
BAHADUR, D
MEDHEKAR, NV
ASLAM, M
 
Subject Cu2ZnSnS4 (CZTS) thin films
Single-step electrodeposition
Kesterites
Sulfurization
Solar cell
SOLAR-CELLS
OXIDE
DEPOSITION
PRECURSORS
ROUTE
ZN
SN
 
Description Here we report on the preparation of high quality Cu2ZnSnS4 thin films using single bath electrodeposition process via an optimized deposition potential. X-ray diffraction and Raman analysis validated the formation of kesterite phase of CZTS without any secondary phases at an optimized deposition potential of -1.4V vs. Ag/AgCl. As a signature of highly pure crystalline films of CZTS kesterite phase, we observed a characteristic Raman peak at 338 cm(-1) that corresponds to the vibration of sulfur atoms. Elemental analysis using energy dispersion analysis of X-rays (EDX) reveals a near ideal composition ratio of 2:1:1:4 for these films, and indicates the formation of the ideal stoichiometric compound. Furthermore, X-ray photoelectron spectroscopy analysis of the grown films illustrates an appropriate chemical composition and valence states of the constituent elements without a trace of free sulfur. Using the chrono- amperometry data and the Scharifker and Hill model we found that the nucleation mechanism for CZTS thin film is instantaneous. Optical properties demonstrated the optimum band gap of 1.5 eV for kesterite CZTS film prepared from a precursor electrodeposited at -1.4 V vs. Ag/AgCl. Mott-Schottky electrical measurements confirm the p-type nature of the film with a carrier concentration of 10(17) cm(-3), a flat band potential of V-FB = 0.7V and space charge region width of 0.2 mu m. (C) 2014 Published by Elsevier Ltd.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-28T16:50:52Z
2014-12-28T16:50:52Z
2014
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 137154-163
0013-4686
1873-3859
http://dx.doi.org/10.1016/j.electacta.2014.05.166
http://dspace.library.iitb.ac.in/jspui/handle/100/16929
 
Language English