A simple and effective method to introduce precise amounts of doping in nanomaterials
produced from the bottom-up assembly of colloidal nanoparticles (NPs) is described. The
procedure takes advantage of a ligand displacement step to incorporate controlled
concentrations of halide ions while removing carboxylic acids from the NP surface. Upon
consolidation of the NPs into dense pellets, halide ions diffuse within the crystal structure,
doping the anion sublattice and achieving n-type electrical doping. Through the …