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Reflectance Improvement by Thermal Annealing of Sputtered Ag/ZnO Back Reflectors in a-Si:H Thin Film Silicon Solar Cells

  • Karin Söderström (a1), Franz-Josef Haug (a1), Céline Pahud (a1), Rémi Biron (a1), Jordi Escarré (a1), Martial Duchamp (a2), Rafal Dunin-Borkowski (a2) (a3) and Christophe Ballif (a1)...

Silver can be used as the back contact and reflector in thin film silicon solar cells. When deposited on textured substrates, silver films often exhibit reduced reflectance due to absorption losses by the excitation of surface plasmon resonances. We show that thermal annealing of the silver back reflector increases its reflectance drastically. The process is performed at low temperature (150°C) to allow the use of plastic sheets such as polyethylene naphthalate and increases the efficiency of single junction amorphous solar cells dramatically. We present the best result obtained on a flexible substrate: a cell with 9.9% initial efficiency and 15.82 mA/cm2 in short circuit current is realized in n-i-p configuration.

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1.Iida, H., Shiba, N., Mishuku, T., Karasawa, H., Ito, A., Yamanaka, M., and Hayashi, Y., IEEE Electr. Device. L. 4, 157159 (1983).
2.Banerjee, A. and Guha, S., J. Appl. Phys. 69, 10301035 (1991).
3.Kluth, O., Rech, B., Houben, L., Wieder, S., Schöpe, G., Beneking, C., Wagner, H., Löffl, A., and Schock, H. W., Thin Solid Films 351, 247253 (1999).
4.Ritchie, R.H., Phys. Rev. 106, 874 (1957).
5.Holst, K. and Raether, H., Optics Commun. 2, 312316 (1970).
6.Faÿ, S., Kroll, U., Bücher, C., Vallat-Sauvain, E., and Shah, A., Sol. Energy Mater. Sol. C. 86, 385397 (2005).
7.Bailat, J., Dominé, D., Schlüchter, R., Steinhauser, J., Faÿ, S., Freitas, F., Bücher, C., Feitknecht, L., Niquille, X., Tscharner, T., Shah, A., and Ballif, C., Proceedings of the Fourth WCPEC Conference, 1533-1536 (2006).
8.Söderström, K., Escarré, J., Cubero, O., Haug, F.-J., Perregaux, S., and Ballif, C., Prog. Photovoltaics 19, 202210 (2011).
9.Escarré, J., Söderström, K., Battaglia, C., Haug, F.-J., and Ballif, C., Sol. Energ. Mater. Sol. C. 95, 881886 (2011).
10.Söderström, K., Haug, F.-J., Escarré, J., Pahud, C., Biron, R., Ballif, C., submitted to Sol. Energ. Mater. Sol. C. (2011).
11.Cubero, O., Haug, F.-J., Ziegler, Y., Sansonnens, L., Couty, P., Fischer, D. and Ballif, C., Sol. Energ. Mater. Sol. C. 95, 606610 (2011).
12.Sweetnam, S., Söderström, T., Haug, F.-J., Cubero, O., Niquille, X., Terrazzoni-Daudrix, V. and Ballif, C., Thin Solid Films (2011) in press.
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  • ISSN: -
  • EISSN: 1946-4274
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