EP1289028-A1  BACH U ET AL: "CHARACTERIZATION OF HOLE TRANSPORT IN A NEW CLASS OF SPIRO-LINKED OLIGOTRIPHENYLAMINE COMPOUNDS" ADVANCED MATERIALS, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 12, no. 14, 19 July 2000 (2000-07-19), pages 1060-1063, XP000959389 ISSN: 0935-9648;  BRABEC C J ET AL: "Interpenetrating Networks of Fullerenes and Conjugated Polymers for Plastic Photovoltaics" PROCEEDINGS OF THE EUROPEAN PHOTOVOLTAIC SOLAR ENERGY CONFERENCE, XX, XX, vol. 1, 1 May 2000 (2000-05-01), pages 39-42, XP002175218;  KRUEGER J ET AL: "MODIFICATION OF TIO2 HETEROJUNCTIONS WITH BENZOIC ACID DERIVATIVES IN HYBRID MOLECULAR SOLID-STATE DEVICES" ADVANCED MATERIALS, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 12, no. 6, 16 March 2000 (2000-03-16), pages 447-451, XP000923878 ISSN: 0935-9648;  SHAHEEN S E ET AL: "2.5% EFFICIENT ORGANIC PLASTIC SOLAR CELLS" APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 78, no. 6, 5 February 2001 (2001-02-05), pages 841-843, XP001001022 ISSN: 0003-6951EP1289028-B1  BACH U ET AL: "CHARACTERIZATION OF HOLE TRANSPORT IN A NEW CLASS OF SPIRO-LINKED OLIGOTRIPHENYLAMINE COMPOUNDS" ADVANCED MATERIALS, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 12, no. 14, 19 July 2000 (2000-07-19), pages 1060-1063, XP000959389 ISSN: 0935-9648;  BRABEC C J ET AL: "Interpenetrating Networks of Fullerenes and Conjugated Polymers for Plastic Photovoltaics" PROCEEDINGS OF THE EUROPEAN PHOTOVOLTAIC SOLAR ENERGY CONFERENCE, XX, XX, vol. 1, 1 May 2000 (2000-05-01), pages 39-42, XP002175218;  KRUEGER J ET AL: "MODIFICATION OF TIO2 HETEROJUNCTIONS WITH BENZOIC ACID DERIVATIVES IN HYBRID MOLECULAR SOLID-STATE DEVICES" ADVANCED MATERIALS, VCH VERLAGSGESELLSCHAFT, WEINHEIM, DE, vol. 12, no. 6, 16 March 2000 (2000-03-16), pages 447-451, XP000923878 ISSN: 0935-9648;  SHAHEEN S E ET AL: "2.5% EFFICIENT ORGANIC PLASTIC SOLAR CELLS" APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 78, no. 6, 5 February 2001 (2001-02-05), pages 841-843, XP001001022 ISSN: 0003-6951