The GQD sensor (Graphene Quantum Dot) is an image sensor
based on graphene. These are two-dimensional carbon compounds that are electrically conductive and light-absorbing. Since graphene emits many times more electrons when struck by a photon, modern image sensors using graphene are more light sensitive than conventional image sensors. Developed at Nanyang Technological University (NTU) in Singapore, the GQD sensor is said to be ten times more light-sensitive than a CMOS sensor
andalso captures both visible light and infrared light
. In this image sensor, the nanostructure of graphene is treated with titanium to trap electrons longer, and theGQD sensor has a spectral photosensitivity of
about 10 A/W. Compared to earlier graphene sensors, this is an increase by a factor of 1,000, and compared to a conventional CMOS sensor, the increase is about a factor of 10. Like other image sensors, the GQD sensor can be used in image sensors of digital cameras and camcorders, but also in infrared cameras, in traffic monitoring and in satellite cameras.