WO200148833-A1  See also references of EP 1178542A1EP1178542-A1  TONEJC A M ET AL: "Transmission electron microscopy studies of nanophase TiO2" MATERIALS SCIENCE AND ENGINEERING B, ELSEVIER SEQUOIA, LAUSANNE, CH, vol. 40, no. 2, September 1996 (1996-09), pages 177-184, XP004053940 ISSN: 0921-5107;  B. O'REGAN ET AL.: "Large enhancement in photocurrent efficiency caused by UV illumination of the dye-sensitized heterojunction TiO2RuLL'NCSCuSCN: Initiation and potential mechanisms" CHEMISTRY OF MATERIALS, vol. 10, no. 6, June 1998 (1998-06), pages 1501-1509, XP002361986 American Chemical Society, Columbus, Ohio;  O'REGAN B ET AL: "EFFICIENT DYE-SENSITIZED CHARGE SEPARATION IN A WIDE-BAND GAP P-N HETEROJUNCTION" JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 80, no. 8, 1996, pages 4749-4754, XP000885268 ISSN: 0021-8979;  TENNAKONE K ET AL: "A DYE-SENSITIZED NANO-POROUS SOLID-STATE PHOTOVOLTAIC CELL" SEMICONDUCTOR SCIENCE AND TECHNOLOGY, IOP, BRISTOL, GB, vol. 10, no. 12, 1 December 1995 (1995-12-01), pages 1689-1693, XP000545068 ISSN: 0268-1242;  TENNAKONE K ET AL: "NANOPOROUS N-TIO2SELENIUMP-CUCNS PHOTOVOLTAIC CELL" JOURNAL OF PHYSICS D. APPLIED PHYSICS, IOP PUBLISHING, BRISTOL, GB, vol. 31, no. 18, 1998, pages 2326-2330, XP000885281 ISSN: 0022-3727;  TENNAKONE K ET AL: "SOLID-STATE PHOTOVOLTAIC CELL SENSITIZED WITH A RUTHENIUM BIPYRIDYL COMPLEX" JOURNAL OF PHYSICS D. APPLIED PHYSICS, IOP PUBLISHING, BRISTOL, GB, vol. 31, no. 12, 21 June 1998 (1998-06-21), pages 1492-1496, XP000869122 ISSN: 0022-3727;  See also references of WO 0148833A1;  B. O'REGAN ET AL.: "Large enhancement in photocurrent efficiency caused by UV illumination of the dye-sensitized heterojunction TiO2/RuLL'NCS/CuSCN: Initiation and potential mechanisms" CHEMISTRY OF MATERIALS, vol. 10, no. 6, June 1998 (1998-06), pages 1501-1509, XP002361986 American Chemical Society, Columbus, Ohio;  TENNAKONE K ET AL: "NANOPOROUS N-TIO2/SELENIUM/P-CUCNS PHOTOVOLTAIC CELL" JOURNAL OF PHYSICS D. APPLIED PHYSICS, IOP PUBLISHING, BRISTOL, GB, vol. 31, no. 18, 1998, pages 2326-2330, XP000885281 ISSN: 0022-3727US39445-E  Graetzel, Michael et al., "A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films", NATURE, vol. 353, Oct. 24, 1991, pp. 737-740.;  O'Regan B et al.: "Efficient dye-sensitized charge separation in a wide-band-gap p-n heterojunction", Journal of Applied Physics, American Institute of Physics, New York, US, vol. 80, No. 8, 1996, pp. 4749-4754.;  O'Regan B. et al.: "Large Enhancement in Photocurrent Efficiency Caused by UV Illumination of the Dye-Sensitized Heterojunction TiO2/RuLL'NCS/CuSCN: Initiation and Potential Mechanisms", Chemistry of Materials, vol. 10, No. 6, Jun. 1998, pp. 1501-1509.;  Tennakone K. et al.: "A dye-sensitized nano-porous solid-state photovoltaic cell", Semiconductor Science and Technology, IOP, Bristol, GB, vol. 10, No. 12, Dec. 1, 1995, pp. 1689-1693.;  Tennakone K. et al.: "A solid-state photovoltaic cell sensitized with a ruthenium bipyridyl complex", Journal of Physics D. Applied Physics, IOP Publishing, Bristol, GB, vol. 31, No. 12, Jun. 21, 1998, pp. 1492-1496.;  Tennakone K. et al.: "Nanoporous n-TiO2/selenium/p-CuCNS photovoltaic cell", Journal of Physics D. Applied Physics, IOP Publishing, Bristol, GB, vol. 31, No. 18, 1998, pp. 2326-2330.;  Tonejc A.M. et al.: "Transmission electron microscopy studies of nanophase TiO2", Materials Science and Engineering B, Elsevier Sequoia, Lausanne, CH, vol. 40, No. 2, Sep. 1996, pp. 177-184.