Red light photoluminescence emission from Mn and Cd co-doped ZnS one-dimensional nanostructures

Wurtzite ZnS one-dimensional (1D) nanostructures with Mn and Cd as dopants were synthesized rapidly with Zn and S in the vapour phase. The Au-film coated Si wafers were used as substrates. Photoluminescence measurements were carried out at room temperature on the Mn-doped, Cd-doped and Mn, Cd co-doped ZnS 1D nanostructures. A red light emission band around 636 nm was found from the Mn and Cd co-doped samples. The mechanism of energy transfer for this emission is discussed.