Comparative studies on solar cell structures using zinc phthalocyanine and fullerenes

M. Egginger, R. Koeppe, F. Meghdadi, P. A. Troshin, R. N. Lyubovskaya, D. Meissner, N. S. Sariciftci

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Citations (Scopus)

Abstract

We compare different structures of organic solar cells based on zinc phthalocyanine (ZnPc) and fullerene derivatives as electron donor and acceptor materials, respectively. Bilayer devices are fabricated and characterized by current-voltage and spectrally resolved photocurrent measurements. In a novel approach, the ZnPc was combined with soluble fullerene derivatives. With a pyrrolidinofullerene bearing chelating pyrridyl-groups we observed a complexation between donor and acceptor molecules. Due to a favorable structuring of the donor-acceptor interface this leads to a significant enhancement of the solar cell performance compared to similar devices where no complexation takes place. Coevaporated bulk heterojunction mixed-layers are introduced between the pristine layers. In these optimized structures short circuit currents up to 13 mA/cm2 are observed. We investigate the voltage dependence of the spectrally resolved photocurrent of ZnPc / Buckminsterfullerene bilayer solar cells and interpret the results in terms of the Gärtner model.

Original languageEnglish
Title of host publicationOrganic Optoelectronics and Photonics II
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventOrganic Optoelectronics and Photonics II - Strasbourg, France
Duration: 3 Apr 20066 Apr 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6192
ISSN (Print)0277-786X

Conference

ConferenceOrganic Optoelectronics and Photonics II
Country/TerritoryFrance
CityStrasbourg
Period3/04/066/04/06

Keywords

  • Fullerenes
  • Gärtner model
  • Organic solar cells
  • Small molecules
  • Zinc phthalocyanine
  • ZnPc

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