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International Journal of Photoenergy
Volume 2009, Article ID 581068, 7 pages
http://dx.doi.org/10.1155/2009/581068
Research Article

Squaraine Planar-Heterojunction Solar Cells

Swiss Federal Laboratories for Materials Testing and Research, EMPA, Ueberlandstrasse 129, 8600 Dübendorf, Switzerland

Received 10 April 2009; Accepted 2 June 2009

Academic Editor: Mohamed Sabry Abdel-Mottaleb

Copyright © 2009 Bin Fan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. W. Ma, C. Yang, X. Gong, K. Lee, and A. J. Heeger, “Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology,” Advanced Functional Materials, vol. 15, no. 10, pp. 1617–1622, 2005. View at Publisher · View at Google Scholar
  2. J. Xue, B. P. Rand, S. Uchida, and S. R. Forrest, “A hybrid planar-mixed molecular heterojunction photovoltaic cell,” Advanced Materials, vol. 17, no. 1, pp. 66–71, 2005. View at Publisher · View at Google Scholar
  3. P. Peumans, A. Yakimov, and S. R. Forrest, “Small molecular weight organic thin-film photodetectors and solar cells,” Journal of Applied Physics, vol. 93, no. 7, pp. 3693–3723, 2003. View at Publisher · View at Google Scholar
  4. M. Riede, T. Müller, W. Tress, R. Schüppel, and K. Leo, “Small-molecule solar cells—status and perspectives,” Nanotechnology, vol. 19, no. 42, Article ID 424001, 12 pages, 2008. View at Publisher · View at Google Scholar
  5. B. P. Rand, J. Genoe, P. Heremans, and J. Poortmans, “Solar cells utilizing small molecular weight organic semiconductors,” Progress in Photovoltaics: Research and Applications, vol. 15, no. 8, pp. 659–676, 2007. View at Publisher · View at Google Scholar
  6. M. T. Lloyd, J. E. Anthony, and G. G. Malliaras, “Photovoltaics from soluble small molecules,” Materials Today, vol. 10, no. 11, pp. 34–41, 2007. View at Publisher · View at Google Scholar
  7. F. Meng, K. Chen, H. Tian, L. Zuppiroli, and F. Nüesch, “Cyanine dye acting both as donor and acceptor in heterojunction photovoltaic devices,” Applied Physics Letters, vol. 82, no. 21, pp. 3788–3790, 2003. View at Publisher · View at Google Scholar
  8. M. T. Lloyd, A. C. Mayer, A. S. Tayi et al., “Photovoltaic cells from a soluble pentacene derivative,” Organic Electronics, vol. 7, no. 5, pp. 243–248, 2006. View at Publisher · View at Google Scholar
  9. G. A. Chamberlain, “Organic solar cells: a review,” Solar Cells, vol. 8, no. 1, pp. 47–83, 1983. View at Google Scholar
  10. H. E. Sprenger and W. Ziegenbein, “Cyclobutenediylium dyes,” Angewandte Chemie International Edition, vol. 7, pp. 530–535, 1968 (English). View at Google Scholar
  11. K.-Y. Law, “Organic photoconductive materials: recent trends and developments,” Chemical Reviews, vol. 93, no. 1, pp. 449–486, 1993. View at Google Scholar
  12. K.-Y. Law and F. C. Bailey, “Squaraine chemistry. Synthesis, characterization, and optical properties of a class of novel unsymmetrical squaraines: [4-(dimethylamino)phenyl](4-methoxyphenyl)squaraine and its derivatives,” Journal of Organic Chemistry, vol. 57, no. 12, pp. 3278–3286, 1992. View at Google Scholar
  13. C.-T. Chen, S. R. Marder, and L.-T. Cheng, “Syntheses and linear and nonlinear optical properties of unsymmetrical squaraines with extended conjugation,” The Journal of the American Chemical Society, vol. 116, no. 7, pp. 3117–3118, 1994. View at Google Scholar
  14. D. L. Morel, “Some aspects of the role of solid state chemistry in the performance of organic solar cells,” Molecular Crystals and Liquid Crystals, vol. 50, no. 1–4, pp. 127–137, 1979. View at Google Scholar
  15. A. Burke, L. Schmidt-Mende, S. Ito, and M. Grätzel, “A novel blue dye for near-IR ‘dye-sensitised’ solar cell applications,” Chemical Communications, no. 3, pp. 234–236, 2007. View at Publisher · View at Google Scholar
  16. Md. K. Nazeeruddin, R. Humphry-Baker, M. Grätzel et al., “Efficient near-IR sensitization of nanocrystalline TiO2 films by zinc and aluminum phthalocyanines,” Journal of Porphyrins and Phthalocyanines, vol. 3, no. 3, pp. 230–237, 1999. View at Google Scholar
  17. S. Alex, U. Santhosh, and S. Das, “Dye sensitization of nanocrystalline TiO2: enhanced efficiency of unsymmetrical versus symmetrical squaraine dyes,” Journal of Photochemistry and Photobiology A, vol. 172, no. 1, pp. 63–71, 2005. View at Publisher · View at Google Scholar
  18. C. Li, W. Wang, X. Wang, B. Zhang, and Y. Cao, “Molecular design of squaraine dyes for efficient far-red and near-IR sensitization of solar cells,” Chemistry Letters, vol. 34, no. 4, pp. 554–555, 2005. View at Publisher · View at Google Scholar
  19. A. Otsuka, K. Funabiki, N. Sugiyama, T. Yoshida, H. Minoura, and M. Matsui, “Dye sensitization of ZnO by unsymmetrical squaraine dyes suppressing aggregation,” Chemistry Letters, vol. 35, no. 6, pp. 666–667, 2006. View at Publisher · View at Google Scholar
  20. S. Hotchandani, S. Das, K. G. Thomas, M. V. George, and P. V. Kamat, “Interaction of semiconductor colloids with J-aggregates of a squaraine dye and its role in sensitizing nanocrystalline semiconductor films,” Research on Chemical Intermediates, vol. 20, no. 9, pp. 927–938, 1994. View at Publisher · View at Google Scholar
  21. J.-H. Yum, P. Walter, S. Huber et al., “Efficient far red sensitization of nanocrystalline TiO2 films by an unsymmetrical squaraine dye,” Journal of the American Chemical Society, vol. 129, no. 34, pp. 10320–10321, 2007. View at Publisher · View at Google Scholar
  22. F. Silvestri, M. D. Irwin, L. Beverina, A. Facchetti, G. A. Pagani, and T. J. Marks, “Efficient squaraine-based solution processable bulk-heterojunction solar cells,” Journal of the American Chemical Society, vol. 130, no. 52, pp. 17640–17641, 2008. View at Publisher · View at Google Scholar
  23. T. Geiger, S. Kuster, J. H. Yum et al., “Molecular design of unsymmetrical squaraine dyes for high efficiency conversion of low energy photon on TiO2 nanocrystalline films,” Advanced Functional Materials, vol. 19, pp. 734–738, 2007. View at Google Scholar
  24. Q. L. Song, F. Y. Li, H. Yang et al., “Small-molecule organic solar cells with improved stability,” Chemical Physics Letters, vol. 416, no. 1–3, pp. 42–46, 2005. View at Publisher · View at Google Scholar
  25. B. Fan, R. Hany, J.-E. Moser, and F. Nüesch, “Enhanced cyanine solar cell performance upon oxygen doping,” Organic Electronics, vol. 9, no. 1, pp. 85–94, 2008. View at Publisher · View at Google Scholar
  26. V. D. Mihailetchi, P. W. M. Blom, J. C. Hummelen, and M. T. Rispens, “Cathode dependence of the open-circuit voltage of polymer:fullerene bulk heterojunction solar cells,” Journal of Applied Physics, vol. 94, no. 10, pp. 6849–6854, 2003. View at Publisher · View at Google Scholar
  27. D. Cheyns, J. Poortmans, P. Heremans et al., “Analytical model for the open-circuit voltage and its associated resistance in organic planar heterojunction solar cells,” Physical Review B, vol. 77, no. 16, Article ID 165332, 10 pages, 2008. View at Publisher · View at Google Scholar
  28. C. Uhrich, D. Wynands, S. Olthof et al., “Origin of open circuit voltage in planar and bulk heterojunction organic thin-film photovoltaics depending on doped transport layers,” Journal of Applied Physics, vol. 104, no. 4, Article ID 043107, 2008. View at Publisher · View at Google Scholar
  29. B. A. Gregg, S.-G. Chen, and R. A. Cormier, “Coulomb forces and doping in organic semiconductors,” Chemistry of Materials, vol. 16, no. 23, pp. 4586–4599, 2004. View at Publisher · View at Google Scholar
  30. A. Geiser, B. Fan, H. Benmansour et al., “Poly(3-hexylthiophene)/C60 heterojunction solar cells: implication of morphology on performance and ambipolar charge collection,” Solar Energy Materials and Solar Cells, vol. 92, no. 4, pp. 464–473, 2008. View at Publisher · View at Google Scholar
  31. E. C. P. Smits, S. Setayesh, T. D. Anthopoulos et al., “Near-infrared light-emitting ambipolar organic field-effect transistors,” Advanced Materials, vol. 19, no. 5, pp. 734–738, 2007. View at Publisher · View at Google Scholar