APL Materials (Feb 2016)

Flexible ITO-free organic solar cells applying aqueous solution-processed V2O5 hole transport layer: An outdoor stability study

  • F. Anderson S. Lima,
  • Michail J. Beliatis,
  • Bérenger Roth,
  • Thomas R. Andersen,
  • Andressa Bortoti,
  • Yegraf Reyna,
  • Eryza Castro,
  • Igor F. Vasconcelos,
  • Suren A. Gevorgyan,
  • Frederik C. Krebs,
  • Mónica Lira-Cantu

DOI
https://doi.org/10.1063/1.4942638
Journal volume & issue
Vol. 4, no. 2
pp. 026104 – 026104-7

Abstract

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Solution processable semiconductor oxides have opened a new paradigm for the enhancement of the lifetime of thin film solar cells. Their fabrication by low-cost and environmentally friendly solution-processable methods makes them ideal barrier (hole and electron) transport layers. In this work, we fabricate flexible ITO-free organic solar cells (OPV) by printing methods applying an aqueous solution-processed V2O5 as the hole transport layer (HTL) and compared them to devices applying PEDOT:PSS. The transparent conducting electrode was PET/Ag/PEDOT/ZnO, and the OPV configuration was PET/Ag/PEDOT/ZnO/P3HT:PC60BM/HTL/Ag. Outdoor stability analyses carried out for more than 900 h revealed higher stability for devices fabricated with the aqueous solution-processed V2O5.