The present disclosure provides nanocrystals(s) containing silicone capping agent(s). Dispersions containing the nanocrystal(s) and at least one of silicone monomer(s), silicone pre-polymer(s), and silicone polymer(s), and optionally additionally containing a solvent are also described. Cured dispersions, compositions of nanocrystal(s) and LEDs and related structures containing the composition(s) are provided in the present disclosure.