(Electro)luminescence of solutions, powders and layers of ZnSe:Cu nanocrystals

摘要

A chemical synthesis is described in which ZnSe:Cu particles slowly grow to a final size of ～3.5 nm radius in 4 h reaction time. During particle growth, samples are extracted to allow the study of the luminescence as a function of particle size and temperature. Quantum size effects are observed to influence both the ZnSe and the Cu~(2+) luminescence. Electrodes of ZnSe:Cu nanocrystals on ITO are fabricated and the potential dependence of the photoluminescence of these electrodes is presented. Electroluminescence of the ZnSe:Cu nanocrystals is observed.