Recently, scientists have discovered a new photodetector made of carbon nanotubes that is able to vary its electrical properties depending on the light it absorbs. This breakthrough could have a huge impact on the field of photodetection, as the new device is able to detect a wide range of wavelengths with high sensitivity and low power consumption. The device is made up of two carbon nanotube heterojunctions, with one nanotube containing a semiconducting material and the other containing a metallic material. When light is absorbed by the device, the electrons in the semiconductor are excited, leading to a change in the device’s electrical properties. This means that the device can be used to detect light of different wavelengths and intensities with minimal power consumption. This could lead to the development of more efficient and sensitive photodetectors that can be used in a wide range of applications.

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source: Phys.org