WO200201838-A1  PETTERSSON ET AL.: 'Modeling photocurrent action spectra of photovoltaic devices based on organic thin films' JOURNAL OF APPLIED PHYSICS vol. 86, no. 1, 01 July 1999, pages 487 - 496, XP002955718;  PEUMANS ET AL.: 'Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes' APPLIED PHYSICS LETTERS vol. 76, no. 19, 08 May 2000, pages 2650 - 2652, XP000950494US6580027-B2  Forrest et al., U.S. patent application Ser. No. 09136,342, "Organic Photosensitive Optoelectronic Devices With Transparent Electrodes", filed Aug. 19, 1998.;  Forrest et al., U.S. patent application Ser. No. 09449,800, "Highly Efficient Multiple Reflection Photosensitive Optoelectronic Device With Optical Concentrator", filed Nov. 26, 1999.;  Forrest et al., U.S. patent application Ser. No. 09449,801, "Organic Photosensitive Optoelectronic Device With an Exciton Blocking Layer", filed Nov. 26, 1999.;  G. Parthasarathy, P.E. Burrows, V. Khalfin, V.G. Kozlov, and S.R. Forrest, Appl. Phys. Lett. 72, 2138 (1998).;  G. Yu, et al., "Polymer photovoltaic Cells: Enhanced efficiencies via a network of internal donor-acceptor heterojunctions" Science 270,pp. 1789-1791 (Dec. 15, 1995).;  I.G. Hill et al., "Organic semiconductor heterointerfaces containing bathocuproine", J. Appl. Phys., vol. 86, No. 8, pp. 4515-4519, Oct. 15, 1999.;  J.H. Schon et al., "Efficient organic photovoltaic diodes based on doped pentacene", Nature 403, pp. 408-410 (Jan. 27, 2000).;  J.H. Schon, et al., "Efficient photovoltaic energy conversion in pentacene-based heterjunctions", Appl. Phys. Lett. 77, pp. 2473-2475 (Oct. 16, 2000).;  J.J.M. Halls, et al., "Efficient photodiodes from interpenetrating polymer networks", Nature 376, pp. 498-500 (Aug. 10, 1995).;  L.A.A. Petterson et al., "Modeling photocurrent action spectra of photovoltaic devices based on organic thin films", J. Appl. Phys., vol. 86, No. 1, pp. 487-496, Jul. 1, 1999.;  M. Granstrom, et al., "Laminated fabrication of polymeric photovoltaic diodes", Nature 395, pp. 257-260 (Sep. 17, 1998).;  P.E. Burrows, Z. Shen, V. Bulovic, D.M. McCarty, S.R. Forrest, J.A. Cronin, and M.E. Thompson,J. Appl. Phys. 79, 7991 (1996).;  Parthasarathy et al., U.S. patent application Ser. No. 09054,707, "Highly Transparent Non-Metallic Cathodes", filed Apr. 3, 1998.;  Pettersson et al, "Modeling photocurrent action spectra of photovoltaic devices based on organic thin films," Journal of Applied Physics, vol. 86, No. 1. pp. 487-496, Jul. 1, 1999.*;  Peumans et al "Efficient photon harvesting at high optical intestines in ultrathin organic double-heterstructure photovoltaic diodes", Applied Physics Letters, vol. 76, No. 19, pp. 2650-52, May 8, 2000.;  R. Mitsumoto et al. "Electronic Structures and Chemical Bonding of Fluorinated Fullerenes Studied by NEXAAFS, UPS and Vacuum-UV Absorption Spectroscopies", J. Phys. Chem. A, vol. 102, No. 3, pp. 552-560 (1998).;  S.E. Shaheen, et al., "2.5% efficient organic plastic solar cells", Appl. Phys. Lett. 78, pp. 841-843 (Feb. 5, 2001).;  S.R. Forrest, "Ultrathin Organic Films Grown by Organic Molecular Beam Deposition and Related Techniques", Chem. Rev. 97, No. 6, pp. 1793-1896 (Sep.Oct. 1997).;  T.M. Brown et al, "Built-in field electroabsorption spectroscopy of polymer light-emitting diodes incorporating a doped poly(3,4-ethylene doixythiophene) hole injection layer", Appl. Phys. Lett., vol. 75, No. 12, pp. 1679-1681, Sep. 20, 1999.;  W. Tang, "Two layer organic photovoltaic cell", Appl. Phys. Lett. 48(2),pp. 183-185 (Jan. 13, 1986).;  W.T. Welford and R. Winston, High Collection Nonimaging Optics, pp. 172-179, Academic Press, 1989.;  Y. Hirose, et al., "Chemistry and electronic properties of metal-organic semiconductor interfaces: L, Ti, In, Sn, Ag, and Au on PTCDA", Phys. Rev. B. 54, pp. 13 748-13 758 (Nov. 15, 1996).US6657378-B2  Forrest et al., U.S. patent aApplication Ser. No. 09449,800, "Highly Efficient Multiple Reflection Photosensitive Optoelectronic Device With Optical Concentrator", filed Nov. 26, 1999.;  Forrest et al., U.S. patent application Ser. No. 09136,342, "Organic Photosensitive Optoelectronic Devices With Transparent Electrodes", filed Aug. 19, 1998.;  Forrest et al., U.S. patent application serial No. 09878,523, "Solar Cells Using Fullerenes", filed Jun. 11, 2001.;  Forrest et al., U.S. patent application. Ser. No. 09449,801, "Organic Photosensitive Optoelectronic Device With an Exciton Blocking Layer", filed Nov. 26, 1999.;  L. Pettersson, et al., "Modeling photocurrent action spectra of photovoltaic devices based on organic thin films", Journal of Applied Physics, vol. 86, No. 1, pp. 487-496, Jul. 1, 1999.;  M. Hiramoto, et al., "Effect of Thin Gold Interstitial-layer on the Photovoltaic Properties of Tandem Organic Solar Cell", Chemistry Letters, pp. 327-330 (1990).;  Parthasarathy et al., U.S. patent application Ser. No. 09054,707, "Highly Transparent Non-Metallic Cathodes", filed Apr. 3, 1998.;  Peumans et al "Efficient photon harvesting at high optical intensities in ultrathin organic double-heterstructure photovoltaic diodes", Applied Physics Letters, vol. 76, No. 19, pp. 2650-2652, May 8, 2000.;  W.T. Welford and R. Winston, High Collection Nonimaging Optics, pp. 172-179, Academic Press, 1989.EP1396033-A1  See references of WO 02101838A1;  PETTERSSON L A A ROMAN L S INGAN[S O: "Modeling photocurrent action spectra of photovoltaic devices based on organic thin films", JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 86, no. 1, 1 July 1999 (1999-07-01), pages 487-496, XP002955718, ISSN: 0021-8979, DOI: DOI:10.1063/1.370757;  HIRAMOTO M ET AL: "Effect of thin gold interstitial-layer on the photovoltaic properties of tandem organic solar cell", BIOORGANIC&MEDICINAL CHEMISTRY LETTERS, PERGAMON, ELSEVIER SCIENCE, GB, 1 January 1990 (1990-01-01), pages 327-330, XP002991125, ISSN: 0960-894X;  See also references of WO 02101838A1US7601910-B2  Pettersson et al, Modeling photocurrent action spectra of photovoltaic devices based on organic thin films, Journal of Applied Physics, vol. 86, No. 1. pp. 487-496, Jul. 1, 1999.;  Peumans et al, Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic devices, Applied Physics Letters, vol. 76(19), pp. 2650-2652, May 8, 2000.EP3118907-A1  M. HIRAMOTO; M. SUEZAKI; M. YOKOYAMA, CHEMISTRY LETTERS, 1990, pages 327;  T.M. BROWN ET AL., APPL. PHYS. LETT., vol. 75, 1999, pages 1679;  R. MITSUMOTO ET AL., J. PHYS. CHEM. A, vol. 102, 1998, pages 552;  I.G. HILL ET AL., J. APPL. PHYS., vol. 86, 1999, pages 4515;  L.A.A. PETTERSON ET AL., J. APPL. PHYS., vol. 86, 1999, pages 487;  PEUMANS ET AL., APPLIED PHYSICS LETTERS, vol. 76, 2000, pages 2650 - 2652;  W.T. WELFORD; R. WINSTON: "High Collection Nonimaging Optics", 1989, ACADEMIC PRESS, article "Welford and Winston", pages: 172 - 175