Solution-processed parallel tandem polymer solar cells using silver nanowires as intermediate electrode

F. Guo, P. Kubis, N. Li, T. Przybilla, G. Matt, T. Stubhan, T. Ameri, B. Butz, E. Spiecker, K. Forberich, C.J. Brabec

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Tandem architecture is the most relevant concept to overcome the efficiency limit of single-junction photovoltaic solar cells. Series-connected tandem polymer solar cells (PSCs) have advanced rapidly during the past decade. In contrast, the development of parallel-connected tandem cells is lagging far behind due to the big challenge in establishing an efficient interlayer with high transparency and high in-plane conductivity. Here, we report all-solution fabrication of parallel tandem PSCs using silver nanowires as intermediate charge collecting electrode. Through a rational interface design, a robust interlayer is established, enabling the efficient extraction and transport of electrons from subcells. The resulting parallel tandem cells exhibit high fill factors of ∼60% and enhanced current densities which are identical to the sum of the current densities of the subcells. These results suggest that solution-processed parallel tandem configuration provides an alternative avenue toward high performance photovoltaic devices. © 2014 American Chemical Society.
Original languageEnglish
Pages (from-to)12632-12640
Number of pages9
JournalACS Nano
Volume8
Issue number12
DOIs
Publication statusPublished - 2014

Keywords / Materials (for Non-textual outputs)

  • Electric resistance measurement
  • Electrodes
  • Nanowires
  • Polymers
  • Silver
  • Solar power generation
  • In-plane conductivity
  • parallel-tandem
  • Photovoltaic devices
  • Photovoltaic solar cells
  • Polymer solar cell (PSCs)
  • Polymer Solar Cells
  • Silver nanowires
  • Solution-processed
  • Solar cells

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