Soluble P3HT-grafted graphene for efficient bilayer-heterojunction photovoltaic devices

ACS Nano. 2010 Oct 26;4(10):5633-40. doi: 10.1021/nn101671t.

Abstract

CH(2)OH-terminated regioregular poly(3-hexylthiophene) (P3HT) was chemically grafted onto carboxylic groups of graphene oxide (GO) via esterification reaction. The resultant P3HT-grafted GO sheets (G-P3HT) are soluble in common organic solvents, facilitating the structure/property characterization and the device fabrication by solution processing. The covalent linkage and the strong electronic interaction between the P3HT and graphene moieties in G-P3HT were confirmed by spectroscopic analyses and electrochemical measurements. A bilayer photovoltaic device based on the solution-cast G-P3HT/C(60) heterostructures showed a 200% increase of the power conversion efficiency (η = 0.61%) with respect to the P3HT/C(60) counterpart under AM 1.5 illumination (100 mW/cm(2)).

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Electrochemistry / methods
  • Electronics
  • Equipment Design
  • Fullerenes / chemistry
  • Graphite / chemistry*
  • Microscopy, Atomic Force / methods
  • Nanotechnology / methods
  • Oxygen / chemistry
  • Photochemistry / methods*
  • Solvents / chemistry
  • Spectrophotometry / methods
  • Ultraviolet Rays

Substances

  • Fullerenes
  • Solvents
  • Graphite
  • fullerene C60
  • Oxygen