Polymer thin-film transistors with chemically modified dielectric interfaces
Abstract
The characteristics of polymeric thin-film transistors can be controlled by chemically modifying the surface of the gate dielectric prior to the deposition of the organic semiconductor. The chemical treatment consists of derivatizing the silicon oxide surface with organic trichlorosilanes to form self-assembled monolayers (SAMs). The deposition of an octadecyltrichlorosilane SAM leads to a mobility of 0.01-0.02 cm2/V s in a polyfluorene copolymer, a 20-fold improvement over the mobility on bare silicon oxide. The mobility enhancement mechanism is likely to involve molecular interactions between the polymer and the SAM.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 2002
- DOI:
- 10.1063/1.1527691
- Bibcode:
- 2002ApPhL..81.4383S
- Keywords:
-
- 81.65.-b;
- 81.05.Lg;
- 85.30.Tv;
- 72.80.Le;
- 73.61.Ph;
- 73.50.Dn;
- 72.20.Fr;
- 68.47.Pe;
- Surface treatments;
- Polymers and plastics;
- rubber;
- synthetic and natural fibers;
- organometallic and organic materials;
- Field effect devices;
- Polymers;
- organic compounds;
- Polymers;
- organic compounds;
- Low-field transport and mobility;
- piezoresistance;
- Low-field transport and mobility;
- piezoresistance;
- Langmuir-Blodgett films on solids;
- polymers on surfaces;
- biological molecules on surfaces