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Development of Stable a-Si/a-SiGe Tandem Solar Cell Submodules Deposited by a Very High Hydrogen Dilution at Low Temperature

  • Masaki Shima (a1), Masao Isomura (a2), Eiji Maruyama (a2), Shingo Okamoto (a2), Hisao Haku (a2), Kenichiro Wakisaka (a2), Seiichi Kiyama (a2) and Shinya Tsuda (a2)...

Abstract

The world's highest stabilized efficiency of 9.5% (light-soaked and measured by the Japan Quality Assurance Organization (JQA)) for an a-Si/a-SiGe superstrate-type solar cell submodule (area: 1200 cm2) has been achieved. This value was obtained by investigating the effects of very-high hydrogen dilution of up to 54:1 (= H2: SiH4) on hydrogenated amorphous silicon germanium (a-SiGe:H) deposition at a low substrate temperature (Ts). It was found that deterioration of the film properties of a-SiGe:H when Ts decreases under low hydrogen dilution conditions can be suppressed by the high hydrogen dilution. This finding probably indicates that the energy provided by hydrogen radicals substitutes for the lost energy caused by the decrease in Ts and that sufficient surface reactions can occur. In addition, results from an estimation of the hydrogen and germanium contents of a-SiGe:H suggest the occurrence of some kinds of structural variations by the high hydrogen dilution. A guideline for optimization of a-SiGe:H films for solar cells can be presented on the basis of the experimental results. The possibility of a-SiGe:H as a narrow gap material for a-Si stacked solar cells in contrast with microcrystalline silicon (μ c-Si:H) will also be discussed from various standpoints. At present, a-SiGe:H is considered to have an advantage over μ1 c-Si:H.

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[1] Staebler, D. L. and Wronski, C. R.: Appl. Phys. Lett. 31 (292) 1977.
[2] Terakawa, A., Shima, M., Sayama, K., Tarui, H., Nishiwaki, H. and Tsuda, S.: Jpn. J. Appl. Phys. 34 (1741) 1995.
[3] Nakamura, N., Takahama, T., Isomura, M., Nishikuni, M., Yoshida, K., Tsuda, S., Nakano, S., Ohnishi, M. and Kuwano, Y.: Jpn. J. Appl. Phys. 28 (1762) 1989.
[4] Shima, M., Terakawa, A., Isomura, M., Tanaka, M. and Tsuda, S.: Proc. 13th E.C. Photovoltaic Solar Energy Conf. (Nice, 1995) p.269.
[5] Shima, M., Terakawa, A., Isomura, M. and Tsuda, S., Jpn. J. Appl. Phys. 36 (2044) 1997.
[6] Wakisaka, K., Sayama, K., Tanaka, M., Isomura, M., Haku, H., Kiyama, S. and Tsuda, S.: Solar Energy Mat. and Solar Cells 49 (121) 1997.
[7] Matsuda, A., Koyama, M., Ikuchi, N., Imanishi, Y. and Tanaka, K.: Jpn. J. Appl. Phys. 25 (1986) L54.
[8] Shirafuji, J., Nagata, S., and Kuwagaki, M.: Jpn. J. Appl. Phys. 25 (336) 1986.
[9] Okamoto, S., Hishikawa, Y., Tsuge, S., Sasaki, M., Ninomiya, K., Nishikuni, M. and Tsuda, S.: Jpn. J. Appl. Phys. 33 (1773) 1994.
[10] Tanaka, K.: OPTOELECTRONICS 4 (143) 1989.
[11] Okamoto, S., Hishikawa, Y. and Tsuda, S.: Jpn. J. Appl. Phys. 35 (26) 1996.
[12] Tanaka, K. and Matsuda, A.: MRS Symp. Proc. Vol. 70 (245) 1986.
[13] Yang, L., Newton, J. and Fieselmann, B.: MRS Symp. Proc. Vol. 149 (497) 1989.
[14] Catalano, A., Arya, R. R., Bennett, M., Yang, L., Morris, J., Goldstein, B., Fieselmann, B., Newton, J. and Wiedeman, S.: Solar Cells, 27 (25) 1989.
[15] Fortmann, C. M.: Proc. of 21st IEEE PV Specialists Conference, Kissimmee, Florida (1990) 1493.
[16] Oda, S., Ishihara, S., Shibata, N., Takagi, S., Shirai, H., Miyauchi, A. and Shimizu, I.: J. Non-Cryst. Solids 77&78 (877) 1985.
[17] Wagner, S., Chu, V., Chen, D. S., Conde, J. P., Aljishi, S. and Smith, Z.: MRS Symp. Proc. Vol. 118 (623) 1988.
[18] Yang, L., Chen, L. and Catalano, A.: MRS Symp. Proc. Vol. 219 (259) 1991.
[19] Meier, J., Dubail, S., Fluckiger, R., Fischer, D., Keppner, H. and Shah, A.: Proc. of 1st WCPEC, Hawaii (1994) Vol. 1,409
[20] Hishikawa, Y, Tsuge, S., Nakamura, N., Tsuda, S., Nakano, S. and Kuwano, Y: Appl.Phys. Lett. 57 (771) 1990.
[21] Hishikawa, Y, Nakamura, N., Tsuda, S., Nakano, S., Kishi, Y and Kuwano, Y: Jpn. J. Appl. Phys. 30 (1008) 1991.
[22] Sasaki, M., Okamoto, S., Hishikawa, Y., Tsuda, S. and Nakano, S.: Sol. Energy Mater. and Sol. Cells 34 (541) 1994.
[23] Fung, C. J., Gruntz, K. J., Ley, L., Cardona, M., Demond, F. J., Muller, G. and Kalbitzer, S.: J. Non-Cryst. Solids 35 &36 (255) 1980.
[24] Shimakawa, K.: J. Non-Cryst. Solids 43 (229) 1981.
[25] Pauling, L., The Nature of the Chemical Bond 3rd ed. (Cornell University Press, Ithaca, New York, 1960), p. 78
[26] Takahama, T., Okamoto, S., Ninomiya, K., Nishikuni, M., Nakamura, N., Tsuda, S., Ohnishi, M., Nakano, S., Kishi, Y and Kuwano, Y: Tech. Dig. Int'l. PVSEC-5, Kyoto, Japan (1990) 375
[27] Nishikuni, M., Ninomiya, K., Tanaka, M, Matsuoka, T., Nakano, S., Okuda, N., Shibuya, H., Ohnishi, M., Kishi, Y., Kuwano, Y and Ohara, S.: Tech. Dig. Int'l. PVSEC-4, Sydney, Australia (1989), vol. 1, 91
[28] Bech, N., Meier, J., Fluckiger, J., Kroll, U., Selvan, J. A. Anna, Keppner, H., Shah, A. and Vanecek, M.: J. Non-Cryst. Solids 198–200 (90) 1996.
[29] Green, M. A. and Keevers, M. J.: Progress in Photovoltaics: Research and Applications 3, (189) 1995.
[30] Torres, P., Meier, J., Fluckiger, J., Kroll, U., Selvan, J. A. Anna, Keppner, H., Shah, A., Littlewood, S. D., Kelly, I. E. and Giannoules, P.: Appl. Phys. Lett. 69 (137) 1996.
[31] Platz, R., Meier, J., Fischer, D., Dubail, S. and Shah, A.: MRS Symp. Proc. Vol. 467 (699) 1997.
[32] Platz, R., Fischer, D., Hof, Ch., Dubail, S., Kroll, U., Meier, J., Fischer, D., Keppner, H. and Shah, A.: MRS Symp. Proc. Vol. 452 (877) 1996.
[33] Keppner, H., Torres, P., Meier, J., Platz, R., Fischer, D., Kroll, U., Dubail, S., Selvan, J. A. Anna, Vaucher, N. Pellaton, Ziegler, Y, Tschamer, R., Hof, Ch., Bech, N., Goetz, M., Pernet, P., Goerliter, M., Wyrsch, N., Veuille, J., Cuperus, J., Shah, A. and Pohl, J.: MRS Symp. Proc. Vol. 452 (865) 1996.

Development of Stable a-Si/a-SiGe Tandem Solar Cell Submodules Deposited by a Very High Hydrogen Dilution at Low Temperature

  • Masaki Shima (a1), Masao Isomura (a2), Eiji Maruyama (a2), Shingo Okamoto (a2), Hisao Haku (a2), Kenichiro Wakisaka (a2), Seiichi Kiyama (a2) and Shinya Tsuda (a2)...

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