NDLI: Route towards high efficiency single phase CuZnSn(S, Se) thin film solar cells: Model experiments and literature review

Content Provider	IEEE Xplore Digital Library
Author	Redinger, A. Berg, D.M. Dale, P.J. Valle, N. Siebentritt, S.
Copyright Year	2011
Description	Author affiliation: University of Luxembourg, Laboratory for Photovoltaics, Belvaux, Luxembourg (Redinger, A.; Berg, D.M.; Dale, P.J.; Siebentritt, S.) \|\| Centre de Recherche Public Gabriel Lippmann, Belvaux, Luxembourg (Valle, N.)
Abstract	Thin film chalcogenide kesterites Cu and Cu (CZTSSe) are promising candidates for the next generation thin film solar cells. They exhibit a high natural abundance of all constituents, a high absorption coefficient and a tunable direct bandgap between 1.0–1.5 eV. A prerequisite for the use of CZTSSe as absorber layers in photovoltaic applications on large scales is a detailed knowledge of the formation reaction. Throughout the literature no consensus is available which describes how a thin film has to be treated in order to form single phase high efficiency material. It is known that above 400°C CZTSSe starts to decompose due to evaporation of Sn(S, Se), i.e. a high vapor pressure material. We will show here that understanding the formation reaction of CZTSSe offers a new route to stop this break down reaction. Absorbers produced by high temperature coevaporation and samples produced by low temperature precursor fabrication followed by annealing in a tube furnace are compared in order to elucidate that in all cases the loss of Sn(S, Se) forms a degraded surface region. This breakdown reaction can be stopped if the heat treatment is performed in a high partial pressure of SnS(e). This improves the solar cell efficiency from 0.02% to 6.1%. The new insights can be used to explain why some of the synthesis routines described in literature yield much better efficiencies than others.
Starting Page	000025
Ending Page	000025
File Size	543414
Page Count	1
File Format	PDF
ISBN	9781424499663
ISSN	01608371
e-ISBN	9781424499656
DOI	10.1109/PVSC.2011.6185836
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Photovoltaic systems Materials Electron tubes IEEE Xplore Absorption
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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