Optical and Electrical Properties of Copper Zinc Tin Sulfide Films As Solar Cell Absorber Materials Prepared by a Compacting Process

The copper zinc tin sulfide (CZTS) thin films are prepared by a promising non vacuum compacting process based on ball milling and coating technique. The results reveal that a well-formed crystalline structure of kesterite CZTS are observed after sintering at 450°C. The optical band gap is 1.49, 1.59...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2018-10, Vol.92 (10), p.2086-2091
Main Authors: Wenliang Fan, Wang, Yanlai, Zhu, Jun, Ban, S. L.
Format: Article
Language:English
Subjects:
Absorbers (materials)
Ball milling
Chemistry
Chemistry and Materials Science
Compacting
Copper
Copper zinc tin sulfide
Electrical properties
Morphology
Optical properties
Performance enhancement
Photochemistry and Magnetochemistry
Photovoltaic cells
Physical Chemistry
Sintering
Solar cells
Thin films
Tin
Titanium nitride
Zinc
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Summary:The copper zinc tin sulfide (CZTS) thin films are prepared by a promising non vacuum compacting process based on ball milling and coating technique. The results reveal that a well-formed crystalline structure of kesterite CZTS are observed after sintering at 450°C. The optical band gap is 1.49, 1.59, 1.33, and 1.21 eV for the films with Cu/Zn/Sn atomic radio of 1.00 : 0.50 : 0.52, 1.00 : 0.44 : 0.41, 1.00 : 0.60 : 0.49, and 1.00 : 0.49 : 0.58, respectively. The compacting process can further improve the performances of CZTS film. For the CZTS thin film with Cu/Zn/Sn atomic radio of 1.00 : 0.60 : 0.49, the surface morphology of the film is significantly improved by a compacting process applied to the coating films before sintering, and the resistivity decreased from 23.67 to 1.18 Ω cm with the compacting pressure increasing from 0 to 200 MPa at room temperature, which showing a promising application of the compacting process method in fabricating CZTS film for solar cells.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024418100060