ITO-free and fully solution-processed semitransparent organic solar cells with high fill factors

F. Guo, X. Zhu, K. Forberich, J. Krantz, T. Stubhan, M. Salinas, M. Halik, S. Spallek, B. Butz, E. Spiecker, T. Ameri, N. Li, P. Kubis, D.M. Guldi, G.J. Matt, C.J. Brabec

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Organic photovoltaic (OPV) solar cells that can be simply processed from solution are in the focus of the academic and industrial community because of their enormous potential to reduce cost. One big challenge in developing a fully solution-processed OPV technology is the design of a well-performing electrode system, allowing the replacement of ITO. Several solution-processed electrode systems were already discussed, but none of them could match the performance of ITO. Here, we report efficient ITO-free and fully solution-processed semitransparent inverted organic solar cells based on silver nanowire (AgNW) electrodes. To demonstrate the potential of these AgNW electrodes, they were employed as both the bottom and top electrodes. Record devices achieved fill factors as high as 63.0%, which is comparable to ITO based reference devices. These results provide important progress for fully printed organic solar cells and indicate that ITO-free, transparent as well as non-transparent organic solar cells can indeed be fully solution-processed without losses. Indium tin oxide (ITO)-free and fully solution-processed organic solar cells are demonstrated by employing AgNW as both the bottom and top electrodes, in conjunction with Al-ZnO and poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) as charge extraction layers. Devices with electrical fill factor (FF) up to 63.0% and fully retained open circuit voltage (Voc) are achieved, indicating that superior optoelectronic and film quality properties of the two interlayers are perfectly compatible to AgNW electrodes. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)1062-1067
Number of pages6
JournalAdvanced Energy Materials
Issue number8
Publication statusPublished - 2013

Keywords / Materials (for Non-textual outputs)

  • Industrial communities
  • Inverted organic solar cells
  • ITO-free
  • Organic photovoltaic (OPV)
  • Organic solar cell
  • Poly(3
  • 4ethylenedioxythiophene): poly(styrenesulfonate)
  • Silver nanowires
  • Solution-processed
  • Conducting polymers
  • Electric properties
  • Electric resistance measurement
  • Electrodes
  • Open circuit voltage
  • Solar cells


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