Abstract
This paper details the preliminary findings of a study to achieve a durable thin-film CdTe photovoltaic (PV) device structure on ultrathin space-qualified cover glass. An aluminum-doped zinc oxide (AZO) transparent conducting oxide was deposited directly onto the cover glass using metalorganic chemical vapor deposition (MOCVD). The AZO demonstrated low sheet resistance of 10 Ω/□ and high optical transparency of 85% as well as excellent adherence and environmental stability. Preliminary deposition of PV layers onto the AZO on cover glass, by MOCVD, showed the possibility of such a structure, yielding a device conversion efficiency of 7.2%. High series resistance (10 Ω cm2) and low V oc (586 mV) were identified as the limiting factors when compared with the authors’ platform process on indium tin oxide-coated aluminosilicate. The coverage of the Cd1−x Zn x S window layer along with the front contacting of the device were shown to be the major causes of the low efficiency. Further deposition of AZO/CdTe employing an oxygen plasma cleaning step to the cover glass and evaporated gold front contacts significantly improved the device performance. With a highest conversion efficiency of 10.2%, series resistance improved to 4.4 Ω cm2, open-circuit voltage (V oc) up to 667 mV, and good adhesion, this represents the first demonstration of direct deposition of CdTe solar cells onto 100-μm-thick space-qualified cover glass.
Similar content being viewed by others
References
H. Cotal, C. Fetzer, J. Boisvert, G. Kinsey, P. Herbert, H. Yoon, and N. Karam, Energy Environ. Sci. 2, 174 (2009).
W. Sebolt, Acta Astronaut. 55, 389 (2004).
J.S. Stroud, J. Chem. Phys. 35, 844–850 (1961).
R. Zwanenburg and M. Kroon, Proceedings of Seventh European Space Power Conference, Stresa, Italy, 9–13 May 2005 (ESA SP-589, 2005).
R. Zwanenburg, Proceedings of the ‘8th European Space Power Conference’, Constance, Germany, 14–19 September 2008 (ESA SP-661, 2008).
W.L. Rance, J.M. Burst, M.O. Reese, D.M. Meysing, C.A. Wolden, T.A. Gessert, S. Garner, P. Cimo, T.M. Barnes, Proceedings of 39th IEEE Photovoltaics Specialists Conference (Tampa, USA, 2013), pp. 1649–1652.
http://investor.firstsolar.com/releasedetail.cfm?releaseid=755244, Accessed 4 Sept 2013.
M.A. Green, K. Emery, Y. Hishikawa, W. Warta, and E.D. Dunlop, Solar cell efficiency tables (v. 42). Prog. Photovolt. Res. Appl. 21, 827 (2013).
S.J.C. Irvine, V. Barrioz, D. Lamb, E.W. Jones, and R.L. Rowlands-Jones, J. Cryst. Growth 310, 5198 (2008).
G. Kartopu, A.J. Clayton, W.S.M. Brooks, S.D. Hodgson, V. Barrioz, A. Maertens, D.A. Lamb, S.J.C. Irvine, Prog. Photovolt: Res. Appl. 22, 18–23 (2014).
A.J. Clayton, S.J.C. Irvine, E.W. Jones, G. Kartopu, V. Barrioz, and W.S.M. Brooks, Sol. Energy Mater. Sol. Cells 101, 68 (2012).
V. Barrioz, G. Kartopu, S.J.C. Irvine, S. Monir, and X. Yang, J. Cryst. Growth 354, 81 (2012).
D.A. Lamb and S.J.C. Irvine, J. Cryst. Growth 273, 111 (2004).
J. Hu and R.G. Gordon, J. Appl. Phys. 71, 880 (1992).
C.H. Ahn, H. Kim, and H.K. Cho, Thin Solid Films 519, 747 (2010).
W.S.M. Brooks, S.J.C. Irvine, V. Barrioz, and A.J. Clayton, Sol. Energy Mater. Sol. Cells 101, 26 (2012).
S.J.C. Irvine, D.A. Lamb, V. Barrioz, A.J. Clayton, W.S.M. Brooks, S. Rugen-Hankey, and G. Kartopu, Thin Solid Films 520, 1167–1173 (2011).
D.E. Swanson, R.M. Geisthardt, J.T. McGoffin, J.D. Williams, and J.R. Sites, IEEE J. Photovolt. 3, 838–842 (2013).
D.E. Swanson, R.M. Lutze, W.S. Sampath, and J.D.Williams, Proceedings of 38th IEEE Photovoltaics Specialists Conference (June 2012), pp. 859–863.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Irvine, S., Lamb, D., Clayton, A. et al. Cadmium Telluride Solar Cells on Ultrathin Glass for Space Applications. J. Electron. Mater. 43, 2818–2823 (2014). https://doi.org/10.1007/s11664-014-3090-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11664-014-3090-9