Quantum dot nanocrystals exhibit interesting optoelectronic properties that have led to their use in chemical and biological sensors, lasers, and light emitting diodes. The ability to control the size, stability, and composition of these particles allows for the optimization of properties for specific applications. In this work, zinc sulfide nanocrystals doped with various metal ions (Mn2+, Cu2+, and Ni2+) over the 0 – 2% concentration range have been synthesized and stabilized using 55,000 MW poly(vinylpyrrolidone) (PVP). The UV/Vis absorption spectrum shows a peak at around 310 nm for all of the synthesized nanoparticles, indicating that the presence of the dopant does not influence the particle size. Photoluminescence spectra have been recorded using an excitation wavelength of 310 nm. Undoped ZnS nanocrystals exhibit an emission peak at 450 nm in the spectrum. Peaks in the photoluminescence spectra corresponding to the dopant ion are red-shifted compared to the peak for undoped ZnS. With increasing addition of the dopant ion, the peak at 450 nm decreases in intensity, while the peak resulting from the dopant ion increases in intensity. This research will lead to a better understanding of the molecular scale properties that control the optoelectronic behavior of quantum dot nanocrystals.