We are interested in the fundamental carrier dynamics in low dimensional materials and the integration of these materials into optoelectronic devices. Some of the material systems which we are working on include:
two dimensional (2D) monolayer semimetals (e.g. graphene) and semiconductors (e.g. MoS2),
quasi-2D semiconducting colloidal nanoplatests and
1D atomically precise graphene nanoribbons (GNRs),
etc. Our research effort can be classified into 2 main parts: (1) understanding fundamental photo-physics in optoelectronic materials upon photo-excitation, e.g. carrier generation, hot carrier cooling, exciton formation, charge separation and charge transport at nanoscale, by static and varied ultrafast spectroscopies (THz spectroscopy, transient absorption, time-resolved PL etc.); (2) device integration and correlating the device performance with the fundamental photo-physics in the materials from optical measurements.
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