Improved photoluminescence quantum yield and stability of CdSe-TOP, CdSe-ODA-TOPO, CdSe/CdS and CdSe/EP nanocomposites

Size-controllablemonodisperse CdSe nanocrystals with different organic cappingwere prepared based on the hot-injectionmethod. The effective separation of nucleation and growthwas achieved by rapidlymixing two highly reactive precursors. As a contrast, we preparedCdSe/CdS nanocrystals (NCs) successfully based on the selective ion layer adsorption and reaction (SILAR) technique. This inorganic capping obtained higher photoluminescence quantum yield (PLQY) of 59.3% compared with organic capping of 40.8%. Furthermore, the CdSe-epoxy resin (EP) composites were prepared by adopting a flexible ex situmethod, and showed excellent stability in the ambient environment for one year. So the composites with both high PLQYof nanocrystals and excellent stability are very promising to device application.