Influence of substrates porosity on the optical behavior of Zn 3 P 2 nanorod thin films

Stoichiometry modulates the optoelectronic functionality of zinc phosphide (Zn3−xP2+x)

“…This is an order of magnitude higher than the Urbach energies from our samples, which is expected considering the significant improvement in the structural order of our thin films in comparison to that of the nanostructured thin films from ref. 40 .…”

“…† This points to the increase in structural disorder with the increase in P concentration, which leads to the long range electrostatic potential uctuations, causing band tailing and effectively narrowing the bandgap, as observed by absorption measurements. It should be noted that the Urbach energy has not been previously reported for monocrystalline zinc phosphide, however a study by Zawawi et al 40 reports Urbach energies in the range of 200 to 330 meV for nanostructured zinc phosphide thin lms. This is an order of magnitude higher than the Urbach energies from our samples, which is expected considering the signicant improvement in the structural order of our thin lms in comparison to that of the nanostructured thin lms from ref.…”

Phosphinecarboxamide as an unexpected phosphorus precursor in the chemical vapour deposition of zinc phosphide thin films

“…9, 10 Direct sublimation of high purity zinc phosphide powder can also be used to form films at low pressure using inert gas condensation. 11 Chemical vapour deposition routes have also been used with potential advantages of increased adherence, non-line of sight deposition and more easily purified precursors -this final point a particular requirement of electronic grade materials. Previously reported CVD routes have made use of diethyl or dimethyl zinc as the zinc source, and phosphine as the phosphorus source.…”