Effect of Sodium Chloride (NaCl) as Crystallization Catalyst on Cu2ZnSnS4 (CZTS) Films Deposited by Wet-solution Coating Method

Title
Effect of Sodium Chloride (NaCl) as Crystallization Catalyst on Cu2ZnSnS4 (CZTS) Films Deposited by Wet-solution Coating Method
Author(s)
박진호김홍탁김창득김찬[김찬]김맹준[김맹준]
Keywords
THIN-FILMS; GROWTH
Issue Date
201410
Publisher
TAYLOR & FRANCIS LTD
Citation
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.602, no.1, pp.144 - 150
Abstract
The CZTS ink was prepared by a sonochemical method and properties of the CZTS thin films deposited by a spraying method were investigated. We used CuCl2, ZnCl2, SnCl2 and thiourea as precursor materials, 2-methoxyethanol as solvent, monoethanolamine as stabilizer, and NaCl as catalyst. X-ray diffraction (XRD) patterns from the CZTS films mainly exhibited the (112), (200), (220), and (312) planes of the kesterite structure. The grain size of CZTS films increased with increasing NaCl concentration. The optical band-gap of CZTS films decreased from 1.27eV to 1.08eV, and the absorption coefficient was increased, when the concentration of NaCl was increased. The elemental ratio of Cu:Zn:Sn:S in CZTS films was approximately 2:1:1:3.6, and the ratio of the films seldom changed at different synthesis conditions. These results demonstrate that the major role of NaCl is the enhancement of crystallinity and light absorption in CZTS films. The CZTS ink developed in this study has a promising potential for the formation of high quality CZTS thin films for photovoltaic devices.
URI
http://hdl.handle.net/YU.REPOSITORY/30673http://dx.doi.org/10.1080/15421406.2014.944754
ISSN
1542-1406
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공과대학 > 화학공학부 > Articles
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