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Title: Light-induced electron paramagnetic resonance evidence of charge transfer in electrospun fibers containing conjugated polymer/fullerene and conjugated polymer/fullerene/carbon nanotube blends

Electrospun sub-micron fibers containing conjugated polymer (poly(3-hexylthiophene), P3HT) with a fullerene derivative, phenyl-C61-butyric acid methylester (PCBM) or a mixture of PCBM and single-walled carbon nanotubes (SWCNTs) were studied by light-induced electron paramagnetic resonance spectroscopy. The results provide experimental evidence of electron transfer between PCBM and P3HT components in both fiber systems and suggest that the presence of a dispersing block-copolymer, which acts via physical adsorption onto the PCBM and SWCNT moieties, does not prevent electron transfer at the P3HT-PCBM interface. These findings suggest a research perspective towards utilization of fibers of functional nanocomposites in fiber-based organic optoelectronic and photovoltaic devices. The latter can be developed in the textile-type large area photovoltaics or individual fiber-based solar cells that will broaden energy applications from macro-power tools to micro-nanoscale power conversion devices and smart textiles.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5]
  1. Department of Physics, Ben-Gurion University of the Negev, Beersheba 84105 (Israel)
  2. Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boker Campus 84990 (Israel)
  3. (Israel)
  4. Ilze Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel)
  5. Department of Mechanical Engineering, Technion, Haifa 32000 (Israel)
Publication Date:
OSTI Identifier:
22025468
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 100; Journal Issue: 11; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; ADSORPTION; BUTYRIC ACID; CHARGE EXCHANGE; COMPOSITE MATERIALS; COPOLYMERS; ELECTRON SPIN RESONANCE; ELECTRON TRANSFER; FIBERS; FULLERENES; INTERFACES; NANOTUBES; PHOTOVOLTAIC EFFECT; REINFORCED MATERIALS; SOLAR CELLS; VISIBLE RADIATION