The influence of the precursor compositional ratio on Cu2ZnSnS4 films prepared by using sulfurization of the metallic precursor

Title
The influence of the precursor compositional ratio on Cu2ZnSnS4 films prepared by using sulfurization of the metallic precursor
Author(s)
김규호아말무하마드이크라술
Keywords
SOLAR-CELL; THIN-FILMS; KESTERITE CU2ZNSNS4; CU; EFFICIENCY; GROWTH
Issue Date
201312
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.63, no.11, pp.2194 - 2198
Abstract
Cu2ZnSnS4 (CZTS) films were prepared by using the sulfurization of sputtered metallic precursors. The compositional ratio of the CZTS films was slightly different compared to their initial metallic precursors due to elemental loss during annealing. The Cu/(Zn+Sn) ratio for the CZTS-1, CZTS-2 and CZTS-3 films were 0.91, 1.06 and 1.21, respectively. In addition, all films had a compositional ratio of Zn/Sn > 1. The grain sizes of the CZTS films increased with increasing Cu ratio. X-ray diffraction and Raman spectroscopy showed that the CZTS films with an excess of copper and zinc had secondary phases of Cu2SnS3 and ZnS. The optical band gap and absorption coefficient for all CZTS films in the range of the experimental compositions were calculated to be 1.5 eV and > 10(4) cm(-1), respectively. The presence of secondary phases related to compositional ratio in the CZTS films influenced the electrical properties. The CZTS-1 film with a Cu-poor and Zn-rich composition whose a carrier concentration, an electrical mobility, and a resistivity values were 2.29 x 10(18) cm(-3), 10.29 cm(2) V-1 s(-1), 3.16 Omega cm, is the most suitable for solar-cell applications.
URI
http://hdl.handle.net/YU.REPOSITORY/28137http://dx.doi.org/10.3938/jkps.63.2194
ISSN
0374-4884
Appears in Collections:
공과대학 > 신소재공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE