Journal Article

FZJ-2020-02729

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png STEM electron beam-induced current measurements of organic-inorganic perovskite solar cells

Duchamp, M. (Corresponding author) ; Hu, H.FZJ* ; Lam, Y. M. ; Dunin-Borkowski, R. E.FZJ* ; Boothroyd, C. B.

2020
Elsevier Science Amsterdam

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Please use a persistent id in citations: http://hdl.handle.net/2128/25954  doi:10.1016/j.ultramic.2020.113047

Abstract: We describe a new approach for preparing organic-inorganic perovskite solar cells for electron beam-induced current (EBIC) measurements in plan-view geometry. This method substantially reduces sample preparation artefacts, provides good electrical contact and keeps the preparation steps as close as possible to those for real devices. Our EBIC images were acquired simultaneously with annular dark-field scanning transmission electron microscopy images using a home-made highly sensitive EBIC amplifier. High-angle annular dark-field images and energy dispersive X-ray maps were recorded from the same area immediately afterwards. This allowed the EBIC contrast to be correlated with regions containing N and a deficiency of O. The EBIC contrast was also found to be similar to secondary electron contrast recorded with a scanning electron microscope. By identifying the generation and absorption electron processes, we determine that EBIC cannot be separated from the secondary electron and absorbed currents. This means that careful analysis needs to be performed before conclusions can be made on the origin of the current measured across p-n or p-i-n junctions.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2020

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