Strongly Luminescent InP/ZnS Core–Shell Nanoparticles

The wide-bandgap semiconducting material, zinc sulfide, has been coated on indium phosphide nanoclusters to a 1–2-Å thickness. The resulting InP–ZnS core–shell particle (as shown in the TEM image; scale 1 cm=5 nm) exhibits bright luminescence at room temperature with quantum efficiencies as high as 23 %.