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

fYear

2014

fDate

8-13 June 2014

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/PVSC.2014.6924950

Filename

6924950