US Patent 7329902 - IR light emitter using SWNTs

http://www.freepatentsonline.com/7329902.html

This patent from STMicroelectronics discloses a new IR LED using single walled carbon nanotubes as an active component. Claim 1 reads:

1. A light-emitting device including: a thin insulating dielectric film including semiconducting single walled carbon nanotubes (SWNTs), the thin insulating dielectric film being a part of a p-insulator or a Si-n nanojunction; wherein the thin insulating dielectric film is Si or a SiO2; and a p-doped silicon electrode and an n-doped silicon electrode that delimit the thin insulating dielectric film including said SWNTs.