The Radiation Detector with Sensitive Elements on the Base of Array of Multi-walled Carbon Nanotubes

Abstract

The detector of the visible and infrared radiation on a multi-walled carbon nanotubes has been studied. The sensitive element was represented by a two-electron square-shaped matrix with linear dimension of 2 mm containing numerous cells (2 μm diameter, 2.3 μm depth, 6 μm distance between cells) in which arrays of multi-walled carbon nanotubes are synthesized. All measurements have been realized at the room temperature. Maximum photo-emf of ~100 mV was reached in the visible and short-range IR of 500–1500 nm and minimum photo-emf of ~0.1 mV in range of 1500–8000 nm. Maximum photosensitivity ~12.2 mA/W was realized at 1100 nm emission wavelength and its capacity of 50 μW. Speed capability was equal to ~30 μs and efficiency factor of energy transformation of infrared radiation into electric—0.13 %. It is expected that the optimization of the parameters of the sensitive element and the mode of operating temperature, characteristics of IR radiation detector on the arrays of multi-walled nanotubes will significantly improve. In particular, the operating range of wavelength, photoconductivity, speed capability and efficiency of energy transformation of IR radiation into electric will increase.