Carbon nanotube papers with p-n junctions along the thickness direction

Conductive papers made from carbon nanotubes and wood fibers exhibit a p-type character. N2 plasma treatment converts paper into n-type and conversion is verified by elemental analyses, work function and Hall-effect measurements. By screening one face of p-type paper in plasma, the p-n junctions are successfully created along the thickness direction and electrical rectification is evident by current-voltage measurement. Conductive papers made from carbon nanotubes and wood fibers exhibit a diode character.

Automated summary

Conductive papers made from carbon nanotubes and wood fibers exhibit p-type characteristics. N2 plasma treatment can convert the paper into n-type, verified through elemental analyses, work function and Hall-effect measurements. By treating one face of the p-type paper in plasma, p-n junctions can be created along the thickness direction, and electrical rectification is observed through current-voltage measurements.