Photoconductivity spectra and x-ray diffraction experiments on PbI2 films photolyzed at 165°C by 488 nm light, in different ambients, show that the observed induced absorption arises from band-gap states associated with the inclusion of isolated oxides or carbonates of lead in the film, rather than states associated with Pb clusters.
© 1977 Optical Society of America
A. B. Buckman and N. H. Hong, "On the origin of the large refractive index change in photolyzed PbI2 films," J. Opt. Soc. Am. 67, 1123-1125 (1977)