Thin photovoltaics based on chalcopyrite film, Cu(In,Ga)Se2 (CIGS) and related alloys, have established a record efficiency over 22,3% on the laboratory scale, but the scale-up is hindered because of the In low availability. Moreover, conventional methods for fabricating chalcogenide-based solar cells involve vacuum processes, e.g. co-evaporation and sputtering. On the other hand, Kesterite photovoltaics utilizing Cu2ZnSnS4, Cu2ZnSnSe4 and Cu2ZnSn(S,Se)4, composed by earth-abundant elements, can be successfully realized using solution-based methodologies. Non-vacuum processes present significant advantages as lower production costs, higher productivity and uniformity of the final stoichiometry composition. In Nature, kesterite is a mineral with a formula Cu2(Zn,Fe)SnS4, in which zinc and iron share the same lattice sites. Therefore, in this context, we present a new chemical procedure to obtain a high quality Cu2ZnSnS4, Cu2(Zn1-xFex)SnS4, and Cu2FeSnS4 thin films composed by highly soluble and inexpensive precursors in a non-toxic solvent. The films were prepared by a Sol-Gel method and the deposition was carried out by in situ gel formation on fluorine doped tin oxide coated glass. The films obtained were characterized by Raman spectroscopy, X-ray diffraction, energy dispersive X-ray analysis, and by electronic scanning microscopy. The developed methodology has successfully identified an innovative way to achieve high quality kesterite thin films for optoelectronic applications.

Trifiletti, V., Mostoni, S., Scotti, R., Binetti, S. (2019). In situ gel formation of high quality kesterite thin films. Intervento presentato a: MCEC 2019 - Materials for Clean Energy Conference, National Physics Laboratory, London, UK.

In situ gel formation of high quality kesterite thin films

Trifiletti, V;Mostoni, S;Scotti, R;Binetti, S
2019

Abstract

Thin photovoltaics based on chalcopyrite film, Cu(In,Ga)Se2 (CIGS) and related alloys, have established a record efficiency over 22,3% on the laboratory scale, but the scale-up is hindered because of the In low availability. Moreover, conventional methods for fabricating chalcogenide-based solar cells involve vacuum processes, e.g. co-evaporation and sputtering. On the other hand, Kesterite photovoltaics utilizing Cu2ZnSnS4, Cu2ZnSnSe4 and Cu2ZnSn(S,Se)4, composed by earth-abundant elements, can be successfully realized using solution-based methodologies. Non-vacuum processes present significant advantages as lower production costs, higher productivity and uniformity of the final stoichiometry composition. In Nature, kesterite is a mineral with a formula Cu2(Zn,Fe)SnS4, in which zinc and iron share the same lattice sites. Therefore, in this context, we present a new chemical procedure to obtain a high quality Cu2ZnSnS4, Cu2(Zn1-xFex)SnS4, and Cu2FeSnS4 thin films composed by highly soluble and inexpensive precursors in a non-toxic solvent. The films were prepared by a Sol-Gel method and the deposition was carried out by in situ gel formation on fluorine doped tin oxide coated glass. The films obtained were characterized by Raman spectroscopy, X-ray diffraction, energy dispersive X-ray analysis, and by electronic scanning microscopy. The developed methodology has successfully identified an innovative way to achieve high quality kesterite thin films for optoelectronic applications.
relazione (orale)
chalcogenide-based solar cells, Kesterite photovoltaics, earth-abundant elements, solution-based methodologies
English
MCEC 2019 - Materials for Clean Energy Conference
2019
2019
open
Trifiletti, V., Mostoni, S., Scotti, R., Binetti, S. (2019). In situ gel formation of high quality kesterite thin films. Intervento presentato a: MCEC 2019 - Materials for Clean Energy Conference, National Physics Laboratory, London, UK.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/228129
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