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Development of CdCl2 Activation to Minimize Zn Loss from Sputtered Cd1-xZnxTe Thin Films for Use in Tandem Solar Cells

  • Fadhil K. Alfadhili (a1), Geethika K. Liyanage (a1), Adam B. Phillips (a1) and Michael J. Heben (a1)

Abstract

Increasing the band gap of cadmium telluride (CdTe) from 1.48 eV to > 2 eV can be achieved by alloying CdTe with ZnTe. Like CdTe, the alloyed films are expected to allow for low cost production, suggesting that Cd1-xZnxTe could be an ideal top cell for mass produced tandem devices. However, the CdCl2 activation of the alloyed films results in a significant loss of Zn, thereby reducing the bandgap. In this study, we demonstrate a novel CdCl2 activation method that does not result in significant Zn loss. By performing the activation step in a closed, inert environment we are able to avoid oxidation of the Zn in the Cd1-xZnxTe film; furthermore, by including sacrificial Zn in the container, an overpressure of ZnCl2 forms limiting the amount of ZnCl2 formed in the film. Both x-ray diffraction, optical measurements, and Auger spectroscopy show that the CdCl2 treatment with no flowing gas minimizes the loss of Zn from the CZT alloy.

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1.Green, M. A., Emery, K., Hishikawa, Y., Warta, W., Dunlop, E. D., Levi, D. H., and Ho-Baillie, A. W. Y., Prog. Photovolt. Res. Appli. 25 (1), 3 (2017).
2.Shockley, W. and Queisser, H. J., J. Appl. Phys. 32 (3), 510 (1961).
4.Mailoa, J. P., Lee, M., Peters, I. M., Buonassisi, T., Panchula, A., and Weiss, D. N., Energy Environ. Sci. 9 (8), 2644 (2016).
5.Coutts, T. J., Emery, K. A., and Scott Ward, J., Prog. Photovolt. Res. Appl. 10 (3), 195 (2002).
6.Rohatgi, A., Ringel, S. A., Sudharsanan, R., Meyers, P. V., Liu, C. H., and Ramanathan, V., Sol. Cells 27 (1), 219 (1989).
7.Ferekides, C. S., Mamazza, R., Balasubramanian, U., and Morel, D. L., Thin Solid Films 480-481, 471 (2005).
8.Hyun Lee, S., Gupta, A., Wang, S., Compaan, A. D., and McCandless, B. E., Sol. Energy Mater. Sol. Cells 86 (4), 551 (2005).
9.Song, T., Kanevce, A., and Sites, J. R., J. Appl. Phys. 119 (23), 233104 (2016).
10.Shimpi, T. M., Kephart, J. M., Swanson, D. E., Munshi, A. H., Sampath, W. S., Abbas, A., and Walls, J. M., J. Vac. Sci. Technol. A 34 (5), 051202 (2016).
11.Kim, H. and Kim, D., Sol. Energy Mater. Sol. Cells 67 (1–4), 297 (2001).
12.Phillips, A. B., Khanal, R. R., Song, Z., Zartman, R. M., DeWitt, J. L., Stone, J. M., Roland, P. J., Plotnikov, V. V., Carter, C. W., Stayancho, J. M., Ellingson, R. J., Compaan, A. D., and Heben, M. J., Nano Lett. 13 (11), 5224 (2013).
13.Dhere, R., Gessert, T., Zhou, J., Asher, S., Pankow, J., and Moutinho, H., Mater. Res. Soc. Symp. Proc. 763, B8.25 (2003).
14.Mohanty, D., Su, P.-Y., Wang, G.-C., Lu, T.-M., and Bhat, I. B., Sol. Energy 135, 209 (2016).
15.Liyanage, G. K., Phillips, A. B., Alfadhili, F. K., Heben, M. J., presented at the 2018 MRS spring meeting, Phoenix, AZ, 2018 (unpublished)
16.Chu, T.L., Chu, S.S., Ferekides, C., Britt, J., J. Appl. Phys. 71 (11) (1992) 56355640.

Keywords

Development of CdCl2 Activation to Minimize Zn Loss from Sputtered Cd1-xZnxTe Thin Films for Use in Tandem Solar Cells

  • Fadhil K. Alfadhili (a1), Geethika K. Liyanage (a1), Adam B. Phillips (a1) and Michael J. Heben (a1)

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