Graphene-based devices for applications in light-sensing and light-energy harvesting

This talk explores various avenues by which graphene can be integrated with various optoelectronic devices. When chemical vapor deposited (CVD) graphene is transferred to glass, we find that it acts as a robust substrate on which photoconductive CuxS films of 1 - 2 ?m thickness can be electrochemically deposited. This design can be extended to solar cell architectures. For optoelectronic memory applications, we transfer micron - sized flakes of graphene on top of MoS2 with similar dimensions. In response to a suitable combination of light and gate pulses, these layered hybrids function as switches whose response can be controlled by an external gate voltage. Our device designs are scalable and the observations are robust even at room temperature.

Ref:J. Phys. Chem. C, 2012, 116 (1), pp 1200-1204