Understanding charge transfer in carbon nanotube-fullerene bulk heterojunctions

Maogang Gong, Tejas A. Shastry, Qiannan Cui, Ryan R. Kohlmeyer, Kyle A. Luck, Andrew Rowberg, Tobin J. Marks, Michael F. Durstock, Hui Zhao, Mark C. Hersam*, Shenqiang Ren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Semiconducting single-walled carbon nanotube/fullerene bulk heterojunctions exhibit unique optoelectronic properties highly suitable for flexible, efficient, and robust photovoltaics and photodetectors. We investigate charge-transfer dynamics in inverted devices featuring a polyethylenimine-coated ZnO nanowire array infiltrated with these blends and find that trap-assisted recombination dominates transport within the blend and at the active layer/nanowire interface. We find that electrode modifiers suppress this recombination, leading to high performance.

Original languageEnglish (US)
Pages (from-to)7428-7435
Number of pages8
JournalACS Applied Materials and Interfaces
Volume7
Issue number13
DOIs
StatePublished - Apr 8 2015

Keywords

  • bulk heterojunction
  • charge transfer
  • fullerenes
  • mechanism
  • nanocarbon

ASJC Scopus subject areas

  • Materials Science(all)

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