Oklahoma/Arkansas MRSEC, DMR-0520550

1. Oklahoma/Arkansas MRSEC, DMR-0520550 Cu:ZnSe Cu:ZnSe Mn:ZnSe Mn:ZnSe Doped Semiconductor Nanocrystals (d-Dots) Achievement: We have achieved the colloidal growth of ZnSe doped (Cu and Mn) quantum dots. We demonstrate that doping chemistry of colloidal nanocrystals is much more complex than what has been proposed in the existing experimental and theoretical reports. Four individual processes, namely “surface adsorption”, “lattice incorporation”, “lattice diffusion”, and “lattice ejection”, have been identified, each of which possesses its own critical temperature. A given type of host nanocrystals can be switched from being impossible to dope to becoming successfully doped. The key is to program the reaction temperature to accommodate all elementary processes. The fluorescence depends on size and dopant. JACS 131, 9333 (2009) This research has resulted in broad band emission and the development of an efficient white light source by our spin-off company -NNLabs