Nature Communications: Breakthrough in SOLED

Recently studied two-dimensional systems such as semiconducting transition metal dichalcogenides (TMDCs) with finite bandgaps have been shown to be very promising for ultrathin and flexible energy conversion and storage devices. Due to the parallel bands in their density of states or the so-called band nesting effect, these atomically thin materials present strong optical responses even for excitation energies far exceeding their bandgaps. However, the fundamental photophysical mechanism and detailed processes for the high-energy hot-carrier relaxation and follow-up extraction in single-layer TDMCs have not yet been elucidated, and could be crucial to understand the work mechanisms in related two-dimensional nanophotonic devices.

 

Prof. Hong-Bo Sun and Hai-Yu Wang