An Alternative Strategy to Adjust the Recombination Mechanism of Organic Photovoltaics by Implementing Ternary Compounds

N. Gasparini, M. Salvador, S. Fladischer, A. Katsouras, A. Avgeropoulos, E. Spiecker, C.L. Chochos, C.J. Brabec, T. Ameri

Research output: Contribution to journalArticlepeer-review

Abstract

Trap-assisted recombination is one of the main loss mechanisms in bulk-heterojunction (BHJ) solar cells. Results suggest that introducing a near infrared (NIR) polymer into the 2,3-bis(3-(octyloxy)phenyl)quinoxaline (PIDTTQ):[6,6]-phenyl C70 butyric acid methyl ester (PC70BM) host system suppresses trap-assisted recombination in the binary blend, leading to a significant improvement of ≈60% in power conversion efficiency for ternary organic solar cells at low light intensity. © 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
JournalAdvanced Energy Materials
Volume5
Issue number24
DOIs
Publication statusPublished - 2015

Keywords

  • Butyric acid
  • Heterojunctions
  • Infrared devices
  • Lanthanum compounds
  • Bulk heterojunction (BHJ)
  • Low light
  • Organic solar cell
  • Power conversion efficiencies
  • recombination
  • Recombination mechanisms
  • Ternary blends
  • Trap-assisted recombinations
  • Solar cells

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