Estimation of Hole Conductivity in Ag-Doped Lead Iodide Film

Hole conductivity values as a function of temperature and iodine pressure in compact and adherent PbI2 film grown on Ag-doped Pb have been estimated from the isothermal parabolic rate constants through a tarnishing study where Mott’s parabolic law of film growth is valid. Iodide films have been grown inside a specially designed iodination reactor in the temperature and iodine pressure ranges of 423–523 K and 0.615–6.578 kPa, respectively. Estimated hole conductivity values have been found to follow a pressure dependence relation of the type σh· = σh·0[p(I2)]1/2 with an associated activation energy value of 84 kJ·mol−1. The iodide film has been characterized by scanning electron microscopy and X-ray diffraction analyses.