Carbon Nanotube Photodetectors and More ? Towards Efficient Photon Counting
Abstract not provided.
Publications
Fullerene-Sensitized Carbon Nanotube Array Phototransistor with Responsivity of 10^8 A/W
Abstract not provided.
Room-Temperature Phototransistor with Negative Photoresponsivity of 108 A W−1 Using Fullerene-Sensitized Aligned Carbon Nanotubes
Small
Detection of low intensity light down to a few photons requires photodetectors with high gain. A new photodetector is reported based on C60-sensitized aligned carbon nanotube (CNT) transistors with an extremely high responsivity of 108 A W−1 (gain > 108) in the ultraviolet and visible range, and 720 A W−1 (gain = 940) in the infrared range. In contrast to most sensitized phototransistors that operate on the photogating effect, the new photodetector operates on the modulation of the electrons scattering in the CNTs, leading to negative photoconductivity. Comparison with similar photodetectors using random CNT networks shows the benefit of using aligned CNTs. At room temperature, the aligned CNT photodetectors are demonstrated to detect a few tens of photons per CNT.
Fullerene-Sensitized Carbon Nanotube Array Phototransistor with Responsivity Exceeding 10^7 A/W
Abstract not provided.
Light Detection with Fullerene-Sensitized Carbon Nanotubes
Abstract not provided.
5 Results