Observation of a type II heterojunction in a highly ordered polymer-carbon nanotube nanohybrid structure.
We report a study of the electronic properties of the heterojunction between regioregular poly(3-hexylthiophene) (rrP3HT) and single-walled carbon nanotubes (SWNTs). Comparison of the spectroscopic data of nanotube dispersions in a range of polymers indicates significant changes in the nature of the observed SWNT excitons only in combination with rrP3HT. A detailed analysis concludes that a type II heterojunction between rrP3HT and small diameter s-SWNTs is formed, making these particular nanohybrids a promising material for organic photovoltaics.
Clarendon Laboratory, UniVersity of Oxford, Parks Road, Oxford, OX1 3PU, UK.
Torben
T
Schuettfort
Adrian
A
Nish
Robin J
RJ
Nicholas