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Nano Research

Article Title

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

Keywords

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

Abstract

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

Publisher

Tsinghua University Press

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