WO200282557-A1  CHAMPNESS C H ET AL: &quot;A CONVENTIONAL SE-CDO CELL OF IMPROVED PERFORMANCE&quot; PHOTOVOLTAIC SPECIALISTS CONFERENCE. KISSIMMEE, MAY 1 - 4, 1984, NEW YORK, IEEE, US, vol. 3 CONF. 17, 1 May 1984 (1984-05-01), pages 933-938, XP000013591;  FERRO R ET AL: &quot;Influence of F-doping on the transmittance and electron affinity of CdO thin films suitable for solar cells technology&quot; SOLAR ENERGY MATERIALS AND SOLAR CELLS, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 64, no. 4, November 2000 (2000-11), pages 363-370, XP004217088 ISSN: 0927-0248EP1374316-A1  See references of WO 02082557A1US6761986-B2  A.M. Baranov, et al, Investigation of the Properties of CdO Films, American Institute of Physics 1997, pp. 805-806.;  C. H. Champness, J.K. Chen and K. Ghoneim, A Conventional Se-CdO Cell of Improved Performance, 1984 IEEE, pp. 933-938.;  K. Tanaka, et al, Electrical and Optical Properties of Sputtered CdO Films, Dialogtech File No. 2 Accession No. 6442870, pp. 1-2.;  Murthy, L.C.S., et al, Thickness Dependent Electrical Properties of CdO Thin Films Prepared by Spraypyrolysis Method, Dialogtech Document, p. 1.;  PCT Search Report, PCT/US02/10651, 4 pages.;  R. Ferro, et al: F-Doped CdO Thin Films Deposied by Spray Pyrolysis, pp. 477-483.;  T.J. Coutts, et al, Search for Improved Transparent Conducting Oxides: A Fundatmental Investigation of CdO, Cd2SnO4, and Zn2SnO4, American Vacuum Society 2000, pp. 2646-2660.;  T.K. Subramanyam, et al, Influence of Oxygen Pressure on the Structural and Optical Properties of DC Magnetron Reactive Sputtered Cadmium Oxide Films, Pysica Scripta, vol. 57, 317-320, 1998.;  T.K. Subramanyam, et al, Preparation and Characterization of CdO Films Deposited by dc Magnetron Reactive Sputtering, Elsevier Science V 1998, pp. 214-220.;  Tadatsugu Minami, New N-Type Transparent Conducting Oxides, MRS. Bulletin/Aug. 2000, vol. 25, No. 8, pp. 38-43.;  X.W. Sun, et al, Improved ITO Thin Films with a Thin ZnO Buffer Layer by Sputtering, 2000 Elsevier Science S.A., pp. 75-81.