Small-bandgap polymer solar cells with unprecedented short-circuit current density and high fill factor

Hyosung Choi, Seo Jin Ko, Taehyo Kim, Pierre Olivier Morin, Bright Walker, Byoung Hoon Lee, Mario Leclerc, Jin Young Kim, Alan J. Heeger

Research output: Contribution to journalArticlepeer-review

282 Scopus citations

Abstract

Small-bandgap polymer solar cells (PSCs) with a thick bulk heterojunction film of 340 nm exhibit high power conversion efficiencies of 9.40% resulting from high short-circuit current density (JSC) of 20.07 mA cm-2 and fill factor of 0.70. This remarkable efficiency is attributed to maximized light absorption by the thick active layer and minimized recombination by the optimized lateral and vertical morphology through the processing additive.

Original languageEnglish
Pages (from-to)3318-3324
Number of pages7
JournalAdvanced Materials
Volume27
Issue number21
DOIs
StatePublished - 1 Jun 2015

Keywords

  • bulk heterojunction
  • polymer solar cells
  • processing additives
  • small bandgap
  • vertical morphology

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