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Incorporation of Cd1-xMgx Te as an Electron Reflector for Cadmium Telluride Photovoltaic Cells

Published online by Cambridge University Press:  30 April 2015

Drew E. Swanson ,
Ali Abbas ,
Amit H. Munshi ,
Jennifer A. Drayton ,
John M. Raguse ,
Russell M. Geisthardt ,
James R. Sites  and
Walajabad S. Sampath
Drew E. Swanson
Affiliation:
Deparment of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
Ali Abbas
Affiliation:
Loughborough University, Loughborough, United Kingdom
Amit H. Munshi
Affiliation:
Deparment of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
Jennifer A. Drayton
Affiliation:
Department of Physics, Colorado State University, Fort Collins, CO, U.S.A.
John M. Raguse
Affiliation:
Department of Physics, Colorado State University, Fort Collins, CO, U.S.A.
Russell M. Geisthardt
Affiliation:
Department of Physics, Colorado State University, Fort Collins, CO, U.S.A.
James R. Sites
Affiliation:
Department of Physics, Colorado State University, Fort Collins, CO, U.S.A.
Walajabad S. Sampath
Affiliation:
Deparment of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
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Abstract

The addition of a CdMgTe (CMT) layer at the back of a CdTe solar cell should improve its performance by reflecting both photoelectrons and forward-current electrons away from the rear surface. Higher collection of photoelectrons will increase the cell’s current, and reduction of forward current will increase its voltage. To achieve electron reflection, conformal CMT layers were deposited at the back of CdTe cells, and a variety of measurements including performance curves, transmission electron microscopy, x-ray photoelectron spectroscopy, and energy-dispersive x-ray spectroscopy were performed. Oxidation of magnesium in the CMT layer was addressed by adding a CdTe capping layer. MgCl2 passivation was substituted for CdCl2 in some cases, but little difference was seen.

Keywords

photovoltaicphysical vapor deposition (PVD)scanning transmission electron microscopy (STEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1771: Symposium B/C/D/E – Recent Advances in Photovoltaics , 2015 , pp. 133 - 138
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Geisthardt, R. M., Topic, M., and Sites, J. R., “Status and Potential of CdTe Solar-Cell Efficiency,” submitted to Journal of Photovoltaics, (Pre-Press).Google Scholar
Hsiao, K. J., Electron-Reflector Strategy for CdTe Thin-Film Solar Cells. Ph.D. Thesis, Colorado State University, (2010).Google Scholar
Kobyakov, P. S., Development of a CdMgTe Thin Films for Application as an Electron Reflector in CdS/CdTe Solar Cells. Ph.D. Thesis, Colorado State University, (2014).Google Scholar
Swanson, D. E. et al. ., “Reduction of Carrier Recombination in CdTe Solar Cells by the addition of a CdMgTe Elctron Reflector Film,” IEEE 40th PVSC, (2014).Google Scholar
Kobyakov, P. S. et al. ., “Deposition and characterization of Cd1−xMgxTe thin films grown by a novel co-sublimation method,“ J. Vac. Sci. Technol. (2014).CrossRefGoogle Scholar
Kephart, J. M. et al. , “Optimization of CdTe thin-film solar cell efficiency using a sputtered, oxygenated CdS window layer”, Prog. Photovolt: Res. Appl., (2015).CrossRefGoogle Scholar
Abbas, A. et al. ., “The Effect of a Post-Activation Annealing Treatment on Thin Film CdTe Device Performance,” IEEE 41th PVSC, (2015).Google Scholar
Kobyakov, P. S., Swanson, D. E. et al. , “Progress Towards a CdS/CdTe Solar Cell Implementing an Electron Reflector,” IEEE 39th PVSC, (2013).Google Scholar
Kobyakov, P. S. et al. , “Grain-level epitaxial growth of CdMgTe thin films onto CdS/CdTe solar cells for electron reflector applications,” submitted to Solar Energy Materials and Solar cells, TBD.Google Scholar
Brennan, B., Mcdonnell, S., and Hughes, G.. “Photoemission Studies of the Interface Formation of Ultrathin MgO Dielectric Layers on the Oxidised Si(111) Surface,” Journal of Physics: Conference Series 100.4 (2008).Google Scholar
Major, J. D., Treharne, R. E., Phillips, L. J, Durose, K.. “A low-cost non-toxic post-growth activation step for CdTe Solar Cells,” Nature 511, pp. 334–337, (2014).Google ScholarPubMed