EP1271580-A  BARBE C J ET AL: "nanocrystalline titanium oxide electrodes for photovoltaic applications" JOURNAL OF THE AMERICAN CERAMIC SOCIETY, AMERICAN CERAMIC SOCIETY. COLUMBUS, US, vol. 80, no. 12, 1997, pages 3157-3171, XP002178698 ISSN: 0002-7820;  MORITZ T ET AL: "Characterization of thin ceramic layers with a graded pore structure" 5TH INTERNATIONAL SYMPOSIUM ON FUNCTIONALLY GRADED MATERIALS, DRESDEN, GERMANY, 26-29 OCT. 1998, vol. 308-311, pages 884-889, XP001034773 Materials Science Forum, 1999, Trans Tech Publications, Switzerland ISSN: 0255-5476;  PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07, 29 September 2000 (2000-09-29) & JP 2000 106222 A (FUJI PHOTO FILM CO LTD), 11 April 2000 (2000-04-11);  ROTHENBERGER G ET AL: "A contribution to the optical design of dye-sensitized nanocrystalline solar cells" SOLAR ENERGY MATERIALS AND SOLAR CELLS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 58, no. 3, 15 July 1999 (1999-07-15), pages 321-336, XP004179801 ISSN: 0927-0248;  USAMI A: "Theoretical study of application of multiple scattering of light to a dye-sensitized nanocrystalline photoelectrochemical cell" CHEMICAL PHYSICS LETTERS, 3 OCT. 1997, ELSEVIER, NETHERLANDS, vol. 277, no. 1-3, pages 105-108, XP001041386 ISSN: 0009-2614EP1271580-A1  BARBE C J ET AL: &quot;nanocrystalline titanium oxide electrodes for photovoltaic applications&quot; JOURNAL OF THE AMERICAN CERAMIC SOCIETY, AMERICAN CERAMIC SOCIETY. COLUMBUS, US, vol. 80, no. 12, 1997, pages 3157-3171, XP002178698 ISSN: 0002-7820;  BARBE C J ET AL: "nanocrystalline titanium oxide electrodes for photovoltaic applications" JOURNAL OF THE AMERICAN CERAMIC SOCIETY, AMERICAN CERAMIC SOCIETY. COLUMBUS, US, vol. 80, no. 12, 1997, pages 3157-3171, XP002178698 ISSN: 0002-7820;  MORITZ T ET AL: &quot;Characterization of thin ceramic layers with a graded pore structure&quot; 5TH INTERNATIONAL SYMPOSIUM ON FUNCTIONALLY GRADED MATERIALS, DRESDEN, GERMANY, 26-29 OCT. 1998, vol. 308-311, pages 884-889, XP001034773 Materials Science Forum, 1999, Trans Tech Publications, Switzerland ISSN: 0255-5476;  MORITZ T ET AL: "Characterization of thin ceramic layers with a graded pore structure" 5TH INTERNATIONAL SYMPOSIUM ON FUNCTIONALLY GRADED MATERIALS, DRESDEN, GERMANY, 26-29 OCT. 1998, vol. 308-311, pages 884-889, XP001034773 Materials Science Forum, 1999, Trans Tech Publications, Switzerland ISSN: 0255-5476;  ROTHENBERGER G ET AL: &quot;A contribution to the optical design of dye-sensitized nanocrystalline solar cells&quot; SOLAR ENERGY MATERIALS AND SOLAR CELLS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 58, no. 3, 15 July 1999 (1999-07-15), pages 321-336, XP004179801 ISSN: 0927-0248;  ROTHENBERGER G ET AL: "A contribution to the optical design of dye-sensitized nanocrystalline solar cells" SOLAR ENERGY MATERIALS AND SOLAR CELLS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 58, no. 3, 15 July 1999 (1999-07-15), pages 321-336, XP004179801 ISSN: 0927-0248;  PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07, 29 September 2000 (2000-09-29) & JP 2000 106222 A (FUJI PHOTO FILM CO LTD), 11 April 2000 (2000-04-11);  PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07, 29 September 2000 (2000-09-29) &amp; JP 2000 106222 A (FUJI PHOTO FILM CO LTD), 11 April 2000 (2000-04-11);  USAMI A: &quot;Theoretical study of application of multiple scattering of light to a dye-sensitized nanocrystalline photoelectrochemical cell&quot; CHEMICAL PHYSICS LETTERS, 3 OCT. 1997, ELSEVIER, NETHERLANDS, vol. 277, no. 1-3, pages 105-108, XP001041386 ISSN: 0009-2614;  USAMI A: "Theoretical study of application of multiple scattering of light to a dye-sensitized nanocrystalline photoelectrochemical cell" CHEMICAL PHYSICS LETTERS, 3 OCT. 1997, ELSEVIER, NETHERLANDS, vol. 277, no. 1-3, pages 105-108, XP001041386 ISSN: 0009-2614EP1271580-B1  BARBE C J ET AL: &quot;nanocrystalline titanium oxide electrodes for photovoltaic applications&quot; JOURNAL OF THE AMERICAN CERAMIC SOCIETY, AMERICAN CERAMIC SOCIETY. COLUMBUS, US, vol. 80, no. 12, 1997, pages 3157-3171, XP002178698 ISSN: 0002-7820;  MORITZ T ET AL: &quot;Characterization of thin ceramic layers with a graded pore structure&quot; 5TH INTERNATIONAL SYMPOSIUM ON FUNCTIONALLY GRADED MATERIALS, DRESDEN, GERMANY, 26-29 OCT. 1998, vol. 308-311, pages 884-889, XP001034773 Materials Science Forum, 1999, Trans Tech Publications, Switzerland ISSN: 0255-5476;  PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07, 29 September 2000 (2000-09-29) &amp; JP 2000 106222 A (FUJI PHOTO FILM CO LTD), 11 April 2000 (2000-04-11);  ROTHENBERGER G ET AL: &quot;A contribution to the optical design of dye-sensitized nanocrystalline solar cells&quot; SOLAR ENERGY MATERIALS AND SOLAR CELLS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 58, no. 3, 15 July 1999 (1999-07-15), pages 321-336, XP004179801 ISSN: 0927-0248;  USAMI A: &quot;Theoretical study of application of multiple scattering of light to a dye-sensitized nanocrystalline photoelectrochemical cell&quot; CHEMICAL PHYSICS LETTERS, 3 OCT. 1997, ELSEVIER, NETHERLANDS, vol. 277, no. 1-3, pages 105-108, XP001041386 ISSN: 0009-2614