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Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells
Author(s) -
Pfohl Moritz,
Glaser Konstantin,
Graf Arko,
Mertens Adrian,
Tune Daniel D.,
Puerckhauer Tanja,
Alam Asiful,
Wei Li,
Chen Yuan,
Zaumseil Jana,
Colsmann Alexander,
Krupke Ralph,
Flavel Benjamin S.
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201600890
Subject(s) - carbon nanotube , materials science , fullerene , nanotechnology , photoluminescence , exciton , nanotube , detection limit , dissociation (chemistry) , optical properties of carbon nanotubes , chemical engineering , carbon nanotube quantum dot , optoelectronics , chemistry , organic chemistry , condensed matter physics , physics , statistics , mathematics , engineering
In this work, for the first time, the diameter limit of surfactant wrapped single walled carbon nanotubes (SWCNTs) in SWCNT:C 60 solar cells is determined through preparation of monochiral small and large diameter nanotube devices as well as those from polychiral mixtures. Through assignment of the different nanotube chiralities by photoluminescence and optical density measurements a diameter limit yielding 0% internal quantum efficiency (IQE) is determined. This work provides insights into the required net driving energy for SWCNT exciton dissociation onto C 60 and establishes a family of ( n , m ) species which can efficiently be utilized in polymer‐free SWCNT:C 60 solar cells. Using this approach the largest diameter nanotube with an IQE > 0% is found to be (8,6) with a diameter of 0.95 nm. Possible strategies to extend this diameter limit are then discussed.