Roll-coating fabrication of ITO-free flexible solar cells based on a non-fullerene small molecule acceptor

Wenqing Liu, Hangqi Shi, Thomas Rieks Andersen, Natalia Klaudia Zawacka, Pei Cheng, Eva Bundgaard, Minmin Shi, Xiaowei Zhan, Frederik C Krebs, Hongzheng Chen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report organic solar cells (OSCs) with non-fullerene small molecule acceptors (SMAs) prepared in large area via a roll coating process. We employ all solution-processed indium tin oxide (ITO)-free flexible substrates for inverted solar cells with a new SMA of F(DPP)(2)B-2. By utilizing poly(3-hexylthiophene) as donor blended with F(DPP)(2)B-2 as acceptor, ITO-free large-area flexible SMA based OSCs were produced under ambient conditions with the use of slot-die coating and flexographic printing methods on a lab-scale compact roll-coater that is readily transferrable to roll-to-roll processing. The effect of different processing solvents on the device performance was investigated, and the best performance with a power conversion efficiency of 0.65%, an open circuit voltage of 0.85 V, a short-circuit current density of 2.19 mA cm(-2), and a fill factor of 35% was obtained.
Original languageEnglish
JournalR S C Advances
Volume5
Issue number45
Pages (from-to)36001-36006
Number of pages6
ISSN2046-2069
DOIs
Publication statusPublished - 2015

Keywords

  • CHEMISTRY,
  • POWER CONVERSION EFFICIENCY
  • ORGANIC PHOTOVOLTAICS
  • ELECTRON-ACCEPTOR
  • DESIGN
  • DIKETOPYRROLOPYRROLE
  • MORPHOLOGY
  • SINGLE
  • FUTURE
  • FILM
  • Coatings
  • Fullerenes
  • Molecules
  • Open circuit voltage
  • Rolls (machine components)
  • Tin oxides
  • Device performance
  • Flexible solar cells
  • Flexible substrate
  • Flexographic printing
  • Inverted solar cells
  • Poly (3-hexylthiophene)
  • Power conversion efficiencies
  • Roll-to-roll processing
  • Solar cells

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