Special Section on Organic Photovoltaics

Open circuit voltage and IV curve shape of ZnPc:C60 solar cells with varied mixing ratio and hole transport layer

[+] Author Affiliations
Wolfgang Tress

Technische Universität Dresden, Institut für Angewandte Photophysik, George Bähr Str. 1, 01069 Dresden, Germany

Steffen Pfuetzner, Karl Leo, Moritz Riede

Technische Universität Dresden, Institut für Angewandte Photophysik, George Bähr Str. 1, 01069 Dresden, Germany

J. Photon. Energy. 1(1), 011114 (March 17, 2011). doi:10.1117/1.3556726
History: Received October 01, 2010; Revised January 20, 2011; Accepted January 31, 2011; Published March 17, 2011
Text Size: A A A

In this contribution the effect of changes in the active material system and modification of contact properties in organic solar cells is investigated at the example of ZnPc:C60 small molecule solar cells. Devices with different blend mixing ratios and a variation of hole transport layer are prepared by vacuum deposition and compared to drift-diffusion simulation data. It is shown that the open circuit voltage is mainly defined by the mixing ratio, whereas the fill factor is strongly influenced by the choice of hole transport layer. Extraction barriers for photogenerated holes lead to S-shaped IV curves. The strength of the S-shape scales with the height of the extraction barrier. The slope of the IV curves at open circuit suggests that the observed increase in open circuit voltage with a higher amount of C60 in the blend might be due to a downshift of the highest occupied molecular orbital of ZnPc.

Figures in this Article
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Wolfgang Tress ; Steffen Pfuetzner ; Karl Leo and Moritz Riede
"Open circuit voltage and IV curve shape of ZnPc:C60 solar cells with varied mixing ratio and hole transport layer", J. Photon. Energy. 1(1), 011114 (March 17, 2011). ; http://dx.doi.org/10.1117/1.3556726


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.