Abstract: Carbon nanotube Schottky barrier photovoltaic cells and methods and apparatus for making the cells are provided. The photovoltaic cells include at least one contact made from a first contact material, at least one contact made from a second contact material and a plurality of photoconducting carbon nanotubes bridging the contacts. A Schottky barrier is formed at the interface between the first contact material and the carbon nanotubes while at the interface between the second contact material and the carbon nanotubes, a Schottky barrier for the opposite carrier is formed, or a small, or no Schottky barrier is formed. It is the Schottky barrier asymmetry that allows the photo-excited electron-hole pairs to escape from the carbon nanotube device.

Abstract: Systems and techniques are described enable the remote activation of digital media from a personal device over a network. The techniques include one or more users browsing a repository of media files using a wired or wireless device and selecting media files from the repository for inclusion in a public queue. Every user may view the public queue on his own wireless device and add value to a media file in the queue. The file with the most associated value plays next over a playback device.