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Journal of Photonics for Energy

Impact of atmospheric species on copper indium gallium selenide solar cell stability: an overview
Author(s): Mirjam Theelen
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Paper Abstract

An overview of the measurement techniques and results of studies on the stability of copper indium gallium selenide (CIGS) solar cells and their individual layers in the presence of atmospheric species is presented: in these studies, Cu(In,Ga)Se2 solar cells, their molybdenum back contact, and their ZnO:Al front contact were exposed to liquid water purged with gases from the atmosphere, like carbon dioxide (CO2), oxygen (O2), nitrogen (N2), and air. The samples were analyzed before, during, and after exposure in order to define their stability under these conditions. The complete CIGS solar cells as well as the ZnO:Al front contact degraded rapidly when exposed to H2O combined with CO2, while they were relatively stable in H2O purged with O2 or N2. This was caused by either degradation of the grain boundaries in the ZnO:Al film or by the dissolution of part of this film. Uncovered molybdenum films, on the other hand, oxidized rapidly in the presence of H2O and O2, while they were more stable in the presence of H2O with N2 and/or CO2.

Paper Details

Date Published: 25 February 2016
PDF: 11 pages
J. Photon. Energy 6(1) 015501 doi: 10.1117/1.JPE.6.015501
Published in: Journal of Photonics for Energy Volume 6, Issue 1
Show Author Affiliations
Mirjam Theelen, TNO (The Netherlands)

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