Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 94, Issue 12, Pages 2042-2045Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2010.06.010
Keywords
Cu2ZnSnS4; Screen printing; Ball milling; Solar cell; Screen printed semiconductor
Funding
- National Natural Science Foundation of China [50730008]
- Shanghai Science and Technology [0752nm015]
- National Basic Research Program of China [2006CB300406]
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Cu2ZnSnS4 layers have been successfully fabricated on flexible polyimide substrates by screen printing. The microparticles of Cu2ZnSnS4, which is the main raw material for preparing screen printing paste, were prepared by wet ball milling and sintering methods. X-ray diffraction characterization results show the screen printed Cu2ZnSnS4 layers were well indexed to single phase Cu2ZnSnS4. Scanning electronic microscopy images show the diameters and lengths of the as-prepared Cu2ZnSnS4 microparticles are about 30-50 and 150-200 nm, respectively. The bandgap, sheet resistance, carrier concentration, and Hall mobility of the screen printed Cu2ZnSnS4 layers were about 1.49 eV, 2.42 x 10(3) Omega, 3.81 x 10(18) cm(-3), and 12.61 cm(2) V-1 s(-s) at 25 degrees C, respectively. To evaluate the photoresponse of the screen printed Cu2ZnSnS4 layers, complete photovoltaic cells with the structure of polyimide/Mo/Cu2ZnSnS4/CdS/ZnO:Al/Al-grid were further fabricated. The short-circuit current density, open-circuit voltage, fill factor, and efficiency of a typical photovoltaic cell with an active area of 0.15 cm(2) were 4.76 mA/cm(2), 386 mV, 0.27. and 0.49%, respectively. (C) 2010 Elsevier B.V. All rights reserved.
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