High resolution 3D chemical characterisation of a cadmium telluride solar cell by dynamic SIMS
conference contributionposted on 21.06.2018 by Tom Fiducia, Kexue Li, Chris R.M. Grovenor, Kurt L. Barth, Walajabad S. Sampath, Michael Walls
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Impurity elements such as chlorine and sulphur can have significant effects on the electrical performance of cadmium telluride (CdTe) solar cells. Here, the 3D distribution of such elements in a cadmium chloride treated CdTe device has been determined by high resolution dynamic SIMS, a novel technique that has not been applied to thin-film PV cells. It is found that as well as segregating to grain boundaries following treatment, chlorine also segregates to the CdS/CdTe interface. Conversely, sulphur shows a U-shaped diffusion profile. These results have potential implications for the processing thin-film CdTe devices.
One of the authors (TF) is grateful to the EPSRC SuperSolar Hub for funding an International Engagement secondment at Colorado State University.
- Mechanical, Electrical and Manufacturing Engineering