Article (Scientific journals)
Investigation of the SnS/Cu2ZnSnS4 Interfaces in Kesterite Thin-Film Solar Cells
Ren, Yi; Richter, Michael; Keller, Jan et al.
2017In ACS Energy Letters, 2 (5), p. 976-981
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Abstract :
[en] Kesterite Cu2ZnSnS4 (CZTS), having only earth abundant elements, is a promising solar cell material. Nevertheless, the impact of the SnS secondary phase, which often forms alongside CZTS synthesis at high annealing temperature, on CZTS solar cells is poorly studied. We confirm, by means of X-ray diffraction, Raman scattering, and energy dispersive X-ray spectroscopy mapping, that this phase tends to segregate at both the surface and the back side of annealed CZTS films with Cu-poor and Zn-rich composition. Using electron beam-induced current measurements, it is further demonstrated that the formation of SnS on the CZTS surface is harmful for solar cells, whereas the SnS phase can be beneficial for solar cells when it segregates on the CZTS rear. This positive contribution of SnS could stem from a passivation effect at the CZTS/SnS rear interface. This work opens new possibilities for an alternative interface development for kesterite-based photovoltaic technology.
Disciplines :
Physics
Author, co-author :
Ren, Yi
Richter, Michael
Keller, Jan
Redinger, Alex ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Unold, Thomas
Donzel-Gargand, Olivier
Scragg, Jonathan J. S.
Bjoerkman, Charlotte Platzer
External co-authors :
yes
Language :
English
Title :
Investigation of the SnS/Cu2ZnSnS4 Interfaces in Kesterite Thin-Film Solar Cells
Publication date :
2017
Journal title :
ACS Energy Letters
eISSN :
2380-8195
Publisher :
American Chemical Society, Washington DC, United States - Washington
Volume :
2
Issue :
5
Pages :
976-981
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 19 October 2017

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