Microelectronics and Optoelectronics

Donor-acceptor heterojunction solar cells based on perylene dimide and perylene bisbenzimidazole*

S. Erten^a1, F. Meghdadi^a2, S. Gunes^a2, R. Koeppe^a2, N. S. Sariciftci^a2 and S. Icli^a1

Ege University, Solar Energy Institute, 35100, Bornova, Izmir, Turkey

Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University, 4040 Linz, Austria

Abstract

We have fabricated heterojunction solar cells comprising active layers of perylene diimide (PDI) or perylene bisbenzimidazole (CONPER, conjugated perylene dye) as electron acceptor and ZnPC as donor. Bilayer solar cells were produced by successive evaporation of zinc phthalocyanine (ZnPC) and perylene diimide (PDI) or perylene bisbenzimidazole (CONPER) on glass substrates coated with indium doped tin oxide. Active layers with different thickness were evaporated. The bilayer cells were characterized under simulated AM 1.5 illumination (100 mW/cm²). The best results were obtained for the device structure of ITO/PEDOT/ZnPC (40 nm)/perylene bisbenzimidazole (60 nm)/Al (70 nm).

(Received July 25 2006)

(Revised October 11 2006)

(Accepted October 17 2006)

(Online publication January 10 2007)

PACS:

• 70. – Condensed matter: electronic structure, electrical, magnetic, and optical properties;
• 73.50.Pz – Photoconduction and photovoltaic effects

sule.erten@ege.edu.tr siddik.icli@ege.edu.tr

Footnotes

^*  This paper has been presented at “ECHOS06”, Paris, 28–30 juin 2006.