Synthesized thin shell passivated silicon nanocrystals with a narrow photoluminescense linewidth

摘要

Directly synthesised silicon nanocrystals with surface passivation shell are exhibiting extraordinary optical properties (for example ultra narrow linewidth). They are synthesized from hydrogen silsesquioxane-like molecules, which are modified by organic molecules, and subsequently annealed at high temperatures in an almost inert atmosphere. During annealing silicon nanocrystals are formed from hydrogen silsesquioxane and the added organic molecules form a surface passivation shell by bonding to the surface Si atoms of the nanocrystals. The invention is particularly useful for preparation of light emitting fluorophores with a narrow emission band, given that inhomogeneous broadening can be reduced.