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. Because graphene emits many times more electrons when struck by a photon, modern image sensors that use graphene are more sensitive to light than conventional image sensors.
The GQD sensor developed at Nanyang Technological University (NTU) in Singapore is said to be ten times more light-sensitive than a CMOS sensor, and also captures both visible light and infrared light. In this image sensor, the nanostructure of graphene is treated with titanium to capture electrons longer.
The GQD 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.