Combining high mobility graphene transistors with efficient light absorbing colloidal quantum dots may pave a way for cheap, high resolving infrared photodetectors. Light is absorbed in the Quantum Dot layer, creating excitons. One charge carrier type is transferred faster to the biased graphene transistor, leading to an additional electric field. This is measured by a current change in the graphene transistor. We are investigating the detailed mechanism of these graphene-QDs photodetectors, expanding the range of spectral photoresponse, increasing the detectivity, and scalling down to the device size below the light wavelength.

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