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Journal of Photonics for Energy • Open Access

Cu2ZnSnS4 polycrystalline thin films with large densely packed grains prepared by sol-gel method
Author(s): Minlin Jiang; Yong Li; Rabin Dhakal; Prem S. Thapaliya; Michael A. Mastro; Joshua Caldwell; Fritz J. Kub; Xingzhong Yan

Paper Abstract

Cu2ZnSnS4 (CZTS) was obtained from a sol-gel precursor which consists of copper chloride, zinc chloride, tin chloride, and thiourea. CZTS thin films were prepared by spin-coating the sol-gel precursor followed by annealing in a nitrogen atmosphere. The morphology, composition, and structure of the absorber layer were studied by scanning electron microscopy, energy dispersive spectroscopy, x-ray diffraction, and Raman scattering. The optical measurement shows the bandgap of these films is ∼1.51 eV, and the optical absorption coefficient is on the order of 104 cm−1. CZTS solar cells with a structure of low-alkali glass/Mo/CZTS/CdS/i-ZnO/ZnO:Al/Al grid were tentatively fabricated. The best solar cell showed a short-circuit current density of 5.06 mA/cm2, an open-circuit voltage of 358 mV, a fill factor of 34.66%, and an efficiency of 0.63% under AM1.5 (100 mW/cm2) illumination. These results demonstrate the CZTS thin films were successfully deposited by a cheap sol-gel technique.

Paper Details

Date Published: 1 January 2011
PDF: 7 pages
J. Photon. Energy. 1(1) 019501 doi: 10.1117/1.3628450
Published in: Journal of Photonics for Energy Volume 1, Issue 1
Show Author Affiliations
Minlin Jiang, South Dakota State Univ. (United States)
Yong Li, South Dakota State Univ. (United States)
Rabin Dhakal, South Dakota State Univ. (United States)
Prem S. Thapaliya, South Dakota State Univ. (United States)
Michael A. Mastro, U.S. Naval Research Lab. (United States)
Joshua Caldwell, U.S. Naval Research Lab. (United States)
Fritz J. Kub, U.S. Naval Research Lab. (United States)
Xingzhong Yan, South Dakota State Univ. (United States)


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