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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

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Carbon nanotube based photocathodes.

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¹Nanocarb Laboratory, Thales-Ecole Polytechnique, Route Departementale 128, 91767 Palaiseau, France.

|August 6, 2011

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A novel photocathode uses carbon nanotubes and photodiodes for efficient electron emission. This technology enables compact microwave amplifiers for satellite communications.

Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Conventional photocathodes integrate photon detection and electron emission.
High-frequency applications require advanced photocathode designs for improved performance.

Purpose of the Study:

To introduce a novel photocathode architecture separating photon-electron conversion and electron emission.
To demonstrate the feasibility of a carbon nanotube-based photocathode for high-frequency applications.

Main Methods:

Fabrication of a photocathode comprising vertically aligned multi-walled carbon nanotubes (MWCNTs) and silicon p-i-n photodiodes.
Utilizing an optically controlled electric field reconfiguration for efficient current modulation.
Testing the photocathode performance using a green laser.

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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

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Published on: August 23, 2012

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Related Experiment Videos

Last Updated: May 30, 2026

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Main Results:

The novel photocathode achieved 0.5 mA photocurrent with a green laser.
An internal quantum efficiency of 10% and an I(ON)/I(OFF) ratio of 30 were recorded.
Demonstrated compatibility with high frequency and very large bandwidth operation.

Conclusions:

The physically separated photon-electron conversion and electron emission design is effective.
This carbon nanotube-based photocathode shows promise for compact, efficient microwave amplifiers.
Potential applications include satellite telecommunication systems requiring high-performance amplification.