1 January 2011 Cu2ZnSnS4 polycrystalline thin films with large densely packed grains prepared by sol-gel method
Author Affiliations +
J. of Photonics for Energy, 1(1), 019501 (2011). doi:10.1117/1.3628450
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.
Minlin Jiang, Yong Li, Rabin Dhakal, Prem S. Thapaliya, Michael A. Mastro, Joshua Caldwell, Fritz J. Kub, Xingzhong Yan, "Cu2ZnSnS4 polycrystalline thin films with large densely packed grains prepared by sol-gel method," Journal of Photonics for Energy 1(1), 019501 (1 January 2011). http://dx.doi.org/10.1117/1.3628450
Submission: Received ; Accepted
JOURNAL ARTICLE
7 PAGES


SHARE
KEYWORDS
Thin films

Sol-gels

Copper

Annealing

Solar cells

Tin

Zinc

Back to Top