High shunt resistance in polymer solar cells comprising a MoO3 hole extraction layer processed from nanoparticle suspension

T. Stubhan, T. Ameri, M. Salinas, J. Krantz, F. MacHui, M. Halik, C.J. Brabec

Research output: Contribution to journalArticlepeer-review

Abstract

In this report, we present solution processed molybdenum trioxide (MoO 3) layers incorporated as hole extraction layer (HEL) in polymer solar cells (PSCs) and demonstrate the replacement of the commonly employed poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) (PEDOT:PSS). MoO3 is known to have excellent electronic properties and to yield more stable devices compared to PEDOT:PSS. We demonstrate fully functional solar cells with up to 65 nm thick MoO3 HEL deposited from a nanoparticle suspension at low temperatures. The PSCs with an active layer comprising a blend of poly(3-hexylthiophene) and [6,6]-phenyl- C61 butyric acid methyl ester and a MoO3 HEL show comparable performance to reference devices with a PEDOT:PSS HEL. The best cells with MoO3 reach a fill factor of 66.7% and power conversion efficiency of 2.92%. Moreover, MoO3 containing solar cells exhibit an excellent shunt behavior with a parallel resistance of above 100 kcm2. © 2011 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Volume98
Issue number25
DOIs
Publication statusPublished - 2011

Keywords

  • Active Layer
  • Fill factor
  • Low temperatures
  • Methyl esters
  • Molybdenum trioxide
  • Nanoparticle suspension
  • Parallel resistance
  • PEDOT:PSS
  • Poly (3-hexylthiophene)
  • Poly(3
  • 4-ethylenedioxythiophene)
  • Polymer Solar Cells
  • Polystyrene sulfonic acid
  • Power conversion efficiencies
  • Reference devices
  • Shunt resistances
  • Solution-processed
  • Butyric acid
  • Conducting polymers
  • Conversion efficiency
  • Electronic properties
  • Ethylene
  • Fatty acids
  • Molybdenum
  • Nanoparticles
  • Polystyrenes
  • Molybdenum oxide

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