Copper-Zinc-Tin-Sulfur Thin Film Using Spin-Coating Technology

Cu₂ZnSnS₄ (CZTS) thin films were deposited on glass substrates by using spin-coating and an annealing process, which can improve the crystallinity and morphology of the thin films. The grain size, optical gap, and atomic contents of copper (Cu), zinc (Zn), tin (Sn), and sulfur (S) in a CZTS thin fil...

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Bibliographic Details
Published in:Materials 2016-06, Vol.9 (7), p.526-526
Main Authors: Yeh, Min-Yen, Lei, Po-Hsun, Lin, Shao-Hsein, Yang, Chyi-Da
Format: Article
Language:English
Subjects:
Annealing
ANNEALING PROCESSES
ANNEALING TEMPERATURE
Atomic beam spectroscopy
COATINGS
Copper
COPPER SULFIDE
CZT
Glass substrates
Morphology
Scanning electron microscopy
Solar cells
Spectrum analysis
Sulfur
THIN FILMS
Tin
Zinc
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Summary:Cu₂ZnSnS₄ (CZTS) thin films were deposited on glass substrates by using spin-coating and an annealing process, which can improve the crystallinity and morphology of the thin films. The grain size, optical gap, and atomic contents of copper (Cu), zinc (Zn), tin (Sn), and sulfur (S) in a CZTS thin film absorber relate to the concentrations of aqueous precursor solutions containing copper chloride (CuCl₂), zinc chloride (ZnCl₂), tin chloride (SnCl₂), and thiourea (SC(NH₂)₂), whereas the electrical properties of CZTS thin films depend on the annealing temperature and the atomic content ratios of Cu/(Zn + Sn) and Zn/Sn. All of the CZTS films were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS), Raman spectroscopy, and Hall measurements. Furthermore, CZTS thin film was deposited on an n-type silicon substrate by using spin-coating to form an Mo/p-CZTS/n-Si/Al heterostructured solar cell. The p-CZTS/n-Si heterostructured solar cell showed a conversion efficiency of 1.13% with = 520 mV, = 3.28 mA/cm², and fill-factor (FF) = 66%.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma9070526