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Title: Enhanced performance of polymer:fullerene bulk heterojunction solar cells upon graphene addition

Graphene has potential for applications in solar cells. We show that the short circuit current density of P3HT (Poly(3-hexylthiophene-2,5-diyl):PCBM((6,6)-Phenyl C61 butyric acid methyl ester) solar cells is enhanced by 10% upon the addition of graphene, with a 15% increase in the photon to electric conversion efficiency. We discuss the performance enhancement by studying the crystallization of P3HT, as well as the electrical transport properties. We show that graphene improves the balance between electron and hole mobilities with respect to a standard P3HT:PCBM solar cell.
Authors:
; ; ; ;  [1] ;  [2] ;  [3] ; ; ; ; ;  [1] ;  [4] ; ;  [5] ; ;  [2]
  1. Institute for Materials Research (IMO), Hasselt University (Belgium)
  2. Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge (United Kingdom)
  3. (Italy)
  4. (Belgium)
  5. Expertise centre for Digital Media (EDM), Hasselt University (Belgium)
Publication Date:
OSTI Identifier:
22310981
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BALANCES; CONVERSION; CRYSTALLIZATION; CURRENT DENSITY; EFFICIENCY; ELECTRICAL FAULTS; ELECTRON MOBILITY; ELECTRONS; FULLERENES; GRAPHENE; HETEROJUNCTIONS; HOLE MOBILITY; PHOTONS; POLYMERS; SOLAR CELLS