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Investigations on the mechanical properties of the elementary thin films composing a CIGS solar cell using the nano indentation technique.

Article dans une revue avec comité de lecture
Author
ABIB, Hocine
IOST, Alain
RAHMOUN, Khadidja
VILCOT, Jean-Pierre
1296 Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
ccMONTAGNE, Alex
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/11959
DOI
10.1016/j.tsf.2016.11.013
Date
2016
Journal
Thin Solid Films

Abstract

The aim of this work is to assess the mechanical properties of the different layers composing a CIGS based solar cell. Fabrication uses the magnetron sputtering deposition technique (except for the CdS layer which was deposited using chemical bath deposition process). We performed several indentation tests on individual layers (Mo back contact layer, CIGS absorber layer, CdS and alternative ZnOS buffer layers, ZnO-AZO window layer) deposited on glass substrates. We mainly report the values of hardness (H) and Young's modulus (E) on each material, through indentation tests with continuous stiffness measurement (CSM) and using an analytical model. The Mo layer remains the hardest and most rigid with H = 8.7 GPa and E = 185 GPa, on the other hand the CIGS layer has a weaker behavior with H = 3 GPa and E = 58 GPa. One might attribute the similar mechanical properties of the ZnO and ZnOS layers to the similarity of their microstructures.

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