title: Polychiral semiconducting carbon nanotube-fullerene solar cells.
abstract: Single-walled carbon nanotubes (SWCNTs) have highly desirable attributes for solution-processable thin-film photovoltaics (TFPVs), such as broadband absorption, high carrier mobility, and environmental stability. However, previous TFPVs incorporating photoactive SWCNTs have utilized architectures that have limited current, voltage, and ultimately power conversion efficiency (PCE). Here, we report a solar cell geometry that maximizes photocurrent using polychiral SWCNTs while retaining high photovoltage, leading to record-high efficiency SWCNT-fullerene solar cells with average NREL certified and champion PCEs of 2.5% and 3.1%, respectively. Moreover, these cells show significant absorption in the near-infrared portion of the solar spectrum that is currently inaccessible by many leading TFPV technologies.
authors.affiliation: Department of Chemistry, University of Kansas , Lawrence, Kansas 66045, United States.
authors.forename: Maogang
authors.initials: M
authors.lastname: Gong
authors.forename: Tejas A
authors.initials: TA
authors.lastname: Shastry
authors.forename: Yu
authors.initials: Y
authors.lastname: Xie
authors.forename: Marco
authors.initials: M
authors.lastname: Bernardi
authors.forename: Daniel
authors.initials: D
authors.lastname: Jasion
authors.forename: Kyle A
authors.initials: KA
authors.lastname: Luck
authors.forename: Tobin J
authors.initials: TJ
authors.lastname: Marks
authors.forename: Jeffrey C
authors.initials: JC
authors.lastname: Grossman
authors.forename: Shenqiang
authors.initials: S
authors.lastname: Ren
authors.forename: Mark C
authors.initials: MC
authors.lastname: Hersam
keywords: bulk heterojunction; carbon nanomaterials; nanowires; photovoltaic