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TEM study of Locations of Cu in CdTe Solar Cells

Published online by Cambridge University Press:  01 February 2011

Yanfa Yan ,
Kim Jones ,
Jie Zhou ,
Xuanzhi Wu  and
Mowafak Al-Jassim
Yanfa Yan
Affiliation:
yanfa_yan@nrel.gov, National Renewable Energy Laboratory, NCPV, 1617 Cole Blvd, Golden, CO, 80401, United States, (303) 384 6456
Kim Jones
Affiliation:
kim_jones@nrel.gov, National Renewable Energy Laboratory, NCPV, 1617 Cole Blvd, Golden, CO, 80401, USA, United States
Jie Zhou
Affiliation:
jie_zhou@nrel.gov, National Renewable Energy Laboratory, NCPV, 1617 Cole Blvd, Golden, CO, 80401, USA, United States
Xuanzhi Wu
Affiliation:
xuanzhi_wu@nrel.gov, National Renewable Energy Laboratory, NCPV, 1617 Cole Blvd, Golden, CO, 80401, USA, United States
Mowafak Al-Jassim
Affiliation:
mowafak_aljassim@nrel.gov, National Renewable Energy Laboratory, NCPV, 1617 Cole Blvd, Golden, CO, 80401, USA, United States
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Abstract

Using scanning transmission electron microscopy and nanoprobe X-ray energy-dispersive spectroscopy, we studied the locations of Cu in CdTe solar cells and test interfaces with intentionally introduced Cu sources. We found three primary locations of Cu: 1) back-contact region, 2) CdTe layer, and 3) CdTe/CdS junction areas. In the back-contact region, Cu diffused from back-contact can convert the Te-rich layer into Cu-Te compounds. In the CdTe layer, a higher concentration of Cu is found to distribute along grain boundaries, but not in twin boundaries and stacking faults. In the CdTe/CdS junction area, Cu is found uniformly in the CdS layer. However, significant segregation of Cu into CdS/TCO interfaces is also found.

Keywords

scanning transmission electron microscopy (STEM)Cusemiconducting
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1012: Symposium Y – Thin-Film Compound Semiconductor Photovoltaics-2007 , 2007 , 1012-Y04-09
Copyright
Copyright © Materials Research Society 2007

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References

1. Wu, X., Keane, J.C., Dhere, R.G., DeHart, C., Albin, D.S., Duda, A., Gessert, T.A., Asher, S., Levi, D.H., and Sheldon, P., Proc. of the 17th European PVSEC, 2001, p995.Google Scholar
2. Wu, X., Zhou, J., Duda, A., Yan, Y., Teeter, G., Asher, S., Metzger, W.K., Demtsu, S., Wei, Su-Huai, and Noufi, R., Thin Solid Films 515, 5798 (2007).Google Scholar
3. Dobson, K.D., Visoly-Fisher, I., Hodes, G., and Cahen, D., Sol. Energy Mater. & Sol. Cells 62, 295 (2000).Google Scholar
4. Berniard, T.J., Albin, D.S., To, B., Pankow, J.W., Young, M., and Asher, S.E., J. Vac. Sci. Technol. B 22, 2423 (2004).Google Scholar
5. Asher, S.E., Hasoon, F.S., Gessert, T.A., Young, M.R., Sheldon, P., Hiltner, J., and Sites, J., 28th IEEE Photovoltaic Specialists Conferences, Anchorage, AK, 2000, p.479.Google Scholar
6. Gessert, T.A., Romero, M.J., Dhere, R.G., and Asher, S.E., Mater. Res. Soc. Symp. Proc. 763, B.3.4 (2003).Google Scholar