Charge Carrier Transfer Dynamics in 0D-2D Heterostructures Studied by Pump-Probe Transient Optical Method

Mixed dimensional heterostructures present recent interest because they can add in optical, electronic and magnetic properties with respect to the elements used to make the mix. Emerging properties can be expected to occur or improved behavior of existing properties can be obtained rather than the added properties expected by the summation of individual properties. Improved or directed behavior can be achieved for example by understanding interfacial interactions between components which are part of the mix. For example carrier transport at the interface can be regulated if one understands the behavior of this process at the interface. Here we present femtosecond tranient optical studies of charge carriers in lead sulphide quantum dot-layered molybdenum sulphyde mixed heterostructures and describe the role of nanoparticle size and layer number of the 2D material on the kinetics of charge transport.