Nano Research

Article Title

All-carbon nanotube diode and solar cell statistically formed from macroscopic network


all-carbon nanotube solar cell, Schottky diode, carbon nanotube diode, carbon nanotube bundles


Schottky diodes and solar cells are statistically created in the contact area between two macroscopic films of single-walled carbon nanotubes (SWNTs) at the junction of semiconducting and quasi-metallic bundles consisting of several high quality tubes. The n-doping of one of the films allows for photovoltaic action, owing to an increase in the built-in potential at the bundle-to-bundle interface. Statistical analysis demonstrates that the Schottky barrier device contributes significantly to the I–V characteristics, compared to the p-n diode. The upper limit of photovoltaic conversion efficiency has been estimated at ~20%, demonstrating that the light energy conversion is very efficient for such a unique solar cell. While there have been multiple studies on rectifying SWNT diodes in the nanoscale environment, this is the first report of a macroscopic all-carbon nanotube diode and solar cell.

Graphical Abstract


Tsinghua University Press