Lead halide perovskites (LHP) are being investigated due to their impressive optoelectronic properties which are also highly robust to crystalline defects and exhibit high photoluminescence quantum yield (PLQY). Their narrow emission linewidth and high photoluminescent quantum yields make them interesting candidates for light-emitting diodes (LEDs) and lasers. Moreover, Solar cells comprised of metal halide perovskite active layers are now achieving performance metrics that make them attractive for commercial applications. In my study I will explore various methods for the synthesis of colloidal LHP nanoplatelets aiming for a better understanding of the growth mechanism and control the shape and size of the NPls.