We have a Ga2O3 sample to perform cathodoluminescence with. The CL system uses an SEM machine for the incident beam. In SEM its traditional to plate the sample in Au/Pd, or something similar, prior to observation. Should the sample be plated in Au/Pd for cathodoluminescence as well? Will this greatly affect the results if it is plated versus not?
Dear Jacob Blevins , according to Gatan, Delmic and Horiba, specimen preparation for cathodoluminescence (CL) should follow the same principles that SEM´s samples, so basically you only need to coat your sample with a thin conductive film when it is non conductive, with conductive samples, including semiconductors, no conductive coat is necessary. Carbon or metals can be used for coating.
https://blog.delmic.com/cl-imaging-sample-preparation
https://whatiscl.info/how/getting-ready/sample-preparation
The publications I could read about CL over Ga2O3 did not use any sort of conductive coating, so I imagine the charge dissipation would be good enough through the carbon tape.
May be the following papers would be useful to your own work:
Article Cathodoluminescence of undoped β-Ga 2O 3 single crystals
Article Localized Cathodolurninescence Investigation on Single Ga2O3...
Hope this helps. Good luck with your experiments.
I second answer of Manuel Gómez . Avoid coating whenever possible, and it looks like it's possible for your specimen.
Hi Jacob, it seems like this has been well answered, but my understanding is that Ga2O3 does not need to be coated with any for Cathodoluminescence measurements, this would be the same for perovskite single crystals.
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