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Sn/Cu/ZnS precursor were deposited by evaporation on soda lime glass at room temperature, and then polycrystalline thin films of Cu 2ZnSnS4 (CZTS) were produced by sulfurizing the precursors in a sulfur atmosphere at a temperature of 550 °C for 3 h Fabricated CZTS thin films were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, ultraviolet-visible-near infrared spectrophotometry, the Hall effect system, and 3D optical microscopy. The experimental results show that, when the ratios of [Cu]/([Zn] + [Sn]) and [Zn]/[Sn] in the CZTS are 0.83 and 1.15, the CZTS thin films possess an absorption coefficient of larger than 4.0 × 104 cm-1 in the energy range 1.5-3.5 eV, and a direct band gap of about 1.47 eV. The carrier concentration, resistivity and mobility of the CZTS film are 6.98 × 1016 cm-3, 6.96 Ωcm, and 12.9 cm2/(Vs), respectively and the conduction type is p-type. Therefore, the CZTS thin films are suitable for absorption layers of solar cells. © 2012 Chinese Institute of Electronics.
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Journal of Semiconductors
ISSN: 1674-4926
CN: 11-5781/TN
Year: 2012
Issue: 2
Volume: 33
4 . 8 0 0
JCR@2023
Cited Count:
SCOPUS Cited Count: 40
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
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30 Days PV: 1
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