For the first time, scientists at the Institute of Photonic Sciences (ICFO) have managed to create a digital imaging sensor that can capture ultraviolet, infrared and visible light at the same time. What wonder materials are behind this breakthrough? No prizes for guessing it’s two of the usual suspects: graphene and quantum dots.
Both of these materials have long individual lists of potential applications, and when you pair them up, that list grows even longer. But in this case, we’re not talking about quantum dots made of graphene – the ICFO team used metallic, PbS colloidal quantum dots deposited onto a sheet of graphene. This hybrid system was then deposited onto a complementary metal-oxide semiconductor (CMOS) wafer, and hooked up to image sensor dies and a read-out circuit.
The end result is a high resolution image sensor that’s sensitive to a huge range of wavelengths, from UV rays of about 300 nm, through the visible spectrum in the middle, and up to infrared light with a wavelength of 2,000 nm. The researchers say this is the first time that a single image sensor has been capable of detecting light across such a wide spectrum at once.
The full story is available below.
Source: New Atlas