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October 4, 2006


Dr. Richard Martel
Regroupement Quebecois sur les Materiaux de Pointe et Departmement de Chimie,
Universite de Montreal
"Carbon Nanotubes for Molecular Electroluminescence"

Abstract.   Single Wall Carbon Nanotubes (SWNT) form a new class of electronic materials with outstanding conductive and optical properties. This lightweight molecular conductor is robust chemically, resistant to high temperature or deformation and compatible with semiconductor processing techniques. The last 10 years of research provided several demonstrations of electronic devices including transistors, field-emitters, super-capacitor and more recently conductive transparent electrodes for charge injection, collection and emission. Most of these prototype devices are currently made at low yield and without much control on the assembly process. The main issue appears to be related to the absence of a reliable chemical technique for nanotubes separation, control placement or assembly. For basic science, the lack of chemical control prevents more elaborated SWNT junctions to be explored. I will first review our work on the electro-optical properties of SWNT devices and then discuss on nanotubes films being used as transparent conductive electrodes for Organic Light Emitting Diode (OLED) devices. These works and related issues stimulate our current efforts to acquire a better understanding of the surface chemistry and the electro-optical properties of SWNTs. 

Vanderbilt University