Significance of solubility product in the solution growth of Pb_(1-x)M_xS (M = Fe, Co, Cd, and Mn) nanoparticle films

摘要

A model is proposed to explain the observed decrease of average grain size with an increase of Fe concentration in the Pb_(1-x)Fe_xS (0.25≤x≤0.75) and Co concentration in the Pb_(1-x)Co_xS (0.15≤x ≤0.35) nanoparticle films. Higher solubility product for MS (M=Fe and Co) as compared to PbS is observed to be responsible for the decrease of grain size with an increase of M concentration in the films. The model was found true for Pb_(1-x)Cd_xS (0.45≤x≤0.85) and Pb_(1-x)Mn_xS (0.03≤x ≤0.37) films.