CuGaSe 2 solar cell cross section studied by Kelvin probe force microscopy in ultrahigh vacuum
- 5 September 2002
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (11) , 2017-2019
- https://doi.org/10.1063/1.1506205
Abstract
Kelvin probe force microscopy under ultrahigh vacuum conditions has been used to image the electronic structure of a Mo/CuGaSe2/CdS/ZnO thin film solar cell. Due to the high energy sensitivity together with a lateral resolution in the nanometer range we obtained detailed information about the various interfaces within the heterostructure. The absolute work function of the different materials was measured on a polished cross section. To obtain a flat and clean surface we optimized the sputtering process with Ar ions. The presence of an additional MoSe2 layer between the Mo backcontact and the CuGaSe2 absorber layer was observed.Keywords
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