title: Understanding charge transfer in carbon nanotube-fullerene bulk heterojunctions.
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.
authors: Maogang
authors: M
authors: Gong
authors: Tejas A
authors: TA
authors: Shastry
authors: Qiannan
authors: Q
authors: Cui
authors: ∥National Research Council, Washington, D.C. 20001, United States.|⊥Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States.
authors: Ryan R
authors: RR
authors: Kohlmeyer
authors: Kyle A
authors: KA
authors: Luck
authors: Andrew
authors: A
authors: Rowberg
authors: Tobin J
authors: TJ
authors: Marks
authors: ⊥Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States.
authors: Michael F
authors: MF
authors: Durstock
authors: Hui
authors: H
authors: Zhao
authors: Mark C
authors: MC
authors: Hersam
authors: Shenqiang
authors: S
authors: Ren
keywords: bulk heterojunction; charge transfer; fullerenes; mechanism; nanocarbon