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EDS Map of a FIB/TEM Lamella of Cu(In,Ga)Se2 Solar Cells

Cu(In,Ga)Se2 is a low cost-high efficiency solar cell material which is already available commercially. Understanding the chemistry of all the multilayers in the CIGS solar cell during different procesing conditions is important to further improve the efficiency. Shown here is an EDS map of a FIB/TEM lamella of CIGS solar cells acquired with XFlash® FlatQUAD EDS detector.

STEM dark field image of 70 nm thick FIB/TEM lamella of a CIGS solar cell. The yellow box shows the region where the EDS map was acquired.
Individual element profiles of the p-type absorber (CIGS) and the n-type buffer (CdS) in a CIGS solar cell.
EDS map of a CIGS solar cell and corresponding spectra extracted from region in the box.