Title :
Impact of Mo density on Mo/CIGSe interfaces: An XPS study
Author :
Harel, S. ; Tomassini, M. ; Arzel, L. ; Gautron, E. ; Barreau, N.
Author_Institution :
Inst. des Mater. Jean Rouxel, Univ. de Nantes, Nantes, France
Abstract :
We have investigated the impact of Mo density onto Mo/CIGSe interfaces. In this study, CIGSe layers have been simultaneously co-evaporated onto different Mo/soda-lime glass (SLG) substrates. Varying the Mo layer density allows to tune the amount of sodium available during CIGSe growth. The chemical composition of the Mo/CIGSe interfaces has been investigated by X-ray photoelectron spectroscopy (XPS) after lift the CIGSe layer off the molybdenum. Na and Ga amount on the Mo side are correlated to the Mo density. The CIGSe morphology is also impacted by Na amount. Two different chemical environments of sodium are distinguished for the fine-grained CIGSe.
Keywords :
X-ray photoelectron spectra; carbon compounds; gallium compounds; glass; iodine compounds; molybdenum; solar cells; Mo-CIGSe; SLG substrates; X-ray photoelectron spectroscopy; XPS study; chemical composition; morphology; soda-lime glass substrates; solar cell performance; Chemicals; Films; Gallium; Morphology; Photovoltaic cells; Surface morphology; Surface treatment; CIGSe; Mo; Na; XPS; back contact material; chemical interface structure;
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th
Conference_Location :
Denver, CO
DOI :
10.1109/PVSC.2014.6924950
