Performance potential of low-defect density silicon thin-film solar cells obtained by electron beam evaporation and laser crystallisation

EPJ Photovoltaics

and M. Green¹  R. Egan²  K. H. Kim¹  U. Schubert²  J. Huang¹  O. Kunz²  D. Ong²  B. Eggleston¹  R. Evans²  S. Varlamov¹  J. Dore¹ 

[1] University of NSW Sydney,NSW 2052,Australia;Suntech R&D Australia, Pty., Ltd. 82-86 Bay St.,Botany,NSW 2019,Australia

Others  :  808606
DOI  :  doi:10.1051/epjpv/2012012

【 摘 要 】

A few microns thick silicon films on glass coated with a dielectric intermediate layer can be crystallised by a single pass of a line-focused diode laser beam. Under favorable process conditions relatively large linear grains with low defect density are formed. Most grain boundaries are defect-free low-energy twin-boundaries. Boron-doped laser crystallised films are processed into solar cells by diffusing an emitter from a phosphorous spin-on-dopant source, measuring up to 539 mV open-circuit voltage prior to metallisation. After applying a point-contact metallisation the best cell achieves 7.8% energy conversion efficiency, open-circuit voltage of 526 mV and short-circuit current of 26 mA/cm2. The efficiency is significantly limited by a low fill-factor of 56% due to the simplified metallisation approach. The internal quantum efficiency of laser crystallised cells is consistent with low front surface recombination. By improving cell metallisation and enhancing light-trapping the efficiencies of above 13% can be achieved.

【 授权许可】

   
© Dore et al., published by EDP Sciences, 2013

【 图 表 】

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

【 参考文献 】

• [1]F.J. Henley, in Proceedings of the IEEE Photovoltaic Specialist Conference, Honolulu, USA, 2010, p. 1184
• [2]H.M. Branz, C.W. Teplin, M.J. Romero, I.T. Martin, Q. Wang, K. Alberti, D.L. Young, P. Stradin, Thin Solid Films 519, 4545 (2011)
• [3]I. Gordon, L. Carnel, D. Van Gestel, G. Beaucarne, J. Poortmans, Prog. Photovolt. : Res. Appl. 15, 574 (2007)
• [4]M. Keevers, T. Young, U. Schubert, M. Green, in Proceedings of the 22 European Photovoltaic Solar Energy Conference, Milan, Italy, 2007
• [5]O. Kunz, Z. Ouyang, S. Varlamov, A. Aberle, Prog. Photovolt. : Res. Appl. 17, 567 (2009)
• [6]R. Egan et al., in Proceedings of the 24 European Photovoltaic Solar Energy Conference, Hamburg, Germany, 2009
• [7]J. Wong, J. Huang, B. Eggleston, M.A. Green, O. Kunz, R. Evans, M. Keevers, R.J. Egan, J. Appl. Phys. 107, 123705 (2010)
• [8]J. Wong, J. Huang, S. Varlamov, M. Green, M. Keevers, Prog. Photovolt. : Res. Appl. (2011), DOI: 10.1002/pip.1154
• [9]D. Amkreutz, J. Muller, M. Schmidt, T. Hanel, T.F. Schulze, Prog. Photovolt. : Res. Appl. 19, 937 (2011)
• [10]W. Seifert, D. Amkreutz, T. Arguirov, M. Krause, M. Schmidt, Solid State Phenomena 178-179, 116 (2011)
• [11]J. Dore, R. Evans, U. Schubert, B. Eggleston, D. Ong, K. Kim, J. Huang, O. Kunz, M. Keevers, R. Egan, S. Varlamov, M. Green, Prog. Photovolt. : Res. Appl., DOI: 10.1002/pip.2282
• [12]J. Dore, R. Evans, B. Eggleston, S. Varlamov, M. Green, MRS Online Proceedings Library 1426 (2012), Doi:10.1557/opl.2012.866
• [13]B. Eggleston, S. Varlamov, J. Huang, R. Evans, J. Dore, M. Green, MRS Online Proceedings Library 1426 (2012), Doi:10.1557/opl.2012.1260
• [14]J. Chen, T. Sekiguchi, D. Yang, F. Yin, K. Kido, S. Tsurekawa, J. Appl. Phys. 96, 5490 (2004)
• [15]T. Noguchi, Jpn J. Appl. Phys. 32, L1584 (1993)
• [16]S.W. Glunz, J. Nekarda, H. Mäckel, A. Cuevas, in Proceedings of the 22 European Photovoltaic Solar Energy Conference, Milan, Italy, 2007, p. 849
• [17]M.A. Green, Solar Cells (University of NSW, 1992), p. 97
• [18]S. Partlin, N. Chang, R. Egan, T. Young, D. Kong, R. Evans, D.A. Clugston, P. Lasswell, A. Turner, J. Dore, T. Florian, in Proceedings of the 25 European Photovoltaic Solar Energy Conference, Valencia, Spain, 2010, p. 3568
• [19]Q. Wang, T. Soderstrom, K. Omaki, A. Lennon, S. Varlamov, Energy Procedia 15, 220 (2012)