Hot-Injection Synthesis of PbE (E = S, Se) Nanoparticles from Dichalcogenoimidophosphinato Lead (II) Complexes

Dichalcogenoimidodiphoshinato lead complexes, [Pb(((EPPr2)-Pr-i)(2)N)(2)] (E = S, Se) have been synthesized and characterized. The crystal structure of [Pb(((SeSPPr2)-Pr-i)(2)N)(2)]), has been solved by single-crystal X-ray crystallography and reported. These complexes have been used as single-source precursors to synthesise PbS and PbSe nanoparticles by hot-injection method in an oleylamine/trioctylphosphine mixture. Powder X-ray diffraction (p-XRD) studies indicate that the nanoparticles produced are cubic. The optical band gaps estimated from the absorption spectrum fitting curve indicate significant tuning of the bulk band gap, blue shifting towards the visible region of the electromagnetic spectrum.