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Characterization of thin CdTe solar cells with a CdSeTe front layer

Published online by Cambridge University Press:  27 August 2019

Alexandra M. Bothwell ,
Jennifer A. Drayton ,
Pascal M. Jundt  and
James R. Sites
Alexandra M. Bothwell*
Affiliation:
Colorado State University, Fort Collins, CO80523, U.S.A.
Jennifer A. Drayton
Affiliation:
Colorado State University, Fort Collins, CO80523, U.S.A.
Pascal M. Jundt
Affiliation:
Colorado State University, Fort Collins, CO80523, U.S.A.
James R. Sites
Affiliation:
Colorado State University, Fort Collins, CO80523, U.S.A.
*
*(Email: Alexandra.Bothwell@colostate.edu)
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Abstract

Thin CdTe photovoltaic device efficiencies show significant improvement with the incorporation of a CdSeTe alloy layer deposited between a MgZnO emitter and CdTe absorber. CdTe and CdSeTe/CdTe devices fabricated by close-space sublimation with a total absorber thickness of 1.5 µm are studied using microscopy measurements and show minimal diffusion of Se into the CdTe. Current loss analysis shows that the CdSeTe layer is the primary absorber in the CdSeTe/CdTe structure, and fill factor loss analysis shows that ideality-factor reduction is the dominant mechanism of fill factor loss. Improvement in the CdSeTe/CdTe absorber quality compared to CdTe is also reflected in spectral and time-resolved photoluminescence measurements. Current density vs. voltage measurements show an increase in current density of up to 2 mA/cm2 with the addition of CdSeTe due to a band gap shift from 1.5 to 1.42 eV for CdTe and CdSeTe/CdTe absorbers respectively. Voltage deficit is lower with the incorporation of the CdSeTe layer, corroborated by improved electroluminescence intensity. The addition of CdSeTe into CdTe device structures has increased device efficiencies from 14.7% to 15.6% for absorbers with a total thickness less than two microns.

Keywords

II-VIphotovoltaicSethin film
Type
Articles
Information
MRS Advances , Volume 4 , Issue 37: Energy and Sustainability , 2019 , pp. 2053 - 2062
Copyright
Copyright © The Authors 2019 

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References

REFERENCES

McCandless, B. and Sites, J., in Handbook of Photovoltaic Science and Engineering, edited by Luque, A. and Hegedus, S., (John Wiley & Sons Ltd., West Sussex, England, 2003), p. 617-618.Google Scholar
Green, M. A., Emery, K., Hishikawa, Y., Warta, W., and Dunlop, E. D., Prog. Photovolt. 23 (1), 1–9 (2015).CrossRefGoogle Scholar
Exclusive: First Solar’s CTO discusses record 18.6% efficient thin-film module (2015). Available at: http://www.greentechmedia.com/articles/read/Exclusive-First-Solars-CTO-Discusses-Record-18.6-Efficient-Thin-Film-ModGoogle Scholar
Munshi, A. et al., IEEE Journal of Photovoltaics 8 (1), 310-314 (2018).CrossRefGoogle Scholar
Fiducia, T. et al., Nature 4 (6), 504-511 (2019).Google Scholar
Kephart, J., PhD. Thesis, Colorado State University, 2015.Google Scholar
Swanson, D.E. et al., Journal of Vacuum Science & Technology A, 34, (2), 021202, (2016).CrossRefGoogle Scholar
Abbas, A. et al., Proc. IEEE 40th Photovolt. Spec. Conf., 0701-0706, (2014).Google Scholar
Munshi, A. et al., Proc. IEEE 40th Photovolt. Spec. Conf., 1643-1648, (2014).Google Scholar
Moore, A., Song, T., and Sites, J., MRS Advances 2 (53), 3195-3201 (2017).CrossRefGoogle Scholar
Raguse, J., PhD. Thesis, Colorado State University, 2015.Google Scholar
Munshi, A. et al., Proc. IEEE 42nd Photovolt. Spec. Conf., 0465-0469, (2016).Google Scholar
Green, M., Solar Cells, (The University of New South Wales, Kensington, NSW) p. 96-98.Google Scholar
Hegedus, S., and Shafarman, W., Prog. Photovolt.: Research and Appl. 12, 155-176 (2004).CrossRefGoogle Scholar
Wojtowicz, A., Master’s Thesis, Colorado State University, 2017.Google Scholar
Kanevce, A., et al., Prog. Photovolt.: Research and Appl. 22, 1138-1146 (2014).CrossRefGoogle Scholar
Kuciauskas, D. et al., IEEE Jour. of Phot., 6, (1), 313-318 (2016).CrossRefGoogle Scholar
Sites, J. and Jundt, P., 15th Photovolt. Science, Appl., and Tech Conference, UK, (2019).Google Scholar
Song, T., Kanevce, A., and Sites, J., J. Apppl. Phys. 119, 233104 (2016).CrossRefGoogle Scholar
Huss, A., Drayton, J., and Sites, J., Proc. IEEE 45th Photovolt. Spec. Conf., 3703-3708, (2018).Google Scholar