Abstract
The synthetic procedure, optical and electrical properties of various sizes and concentrations of PbS nanocrystals (NCs) in hybrid thin films prepared by the sol–gel procedure are presented. Zirconium oxide and Zirconia-Silica-Urethane (ZSUR) matrices with different concentration of di-urethane-silica (DURS—0–12.5 mole%), are used as host materials. TEM and absorption measurements showed that the average diameter of the PbS NCs varied between 2.0 and 8.0 nm with an increase in the temperature treatment and with an increase of the concentration of DURS and the PbS volume fraction (5–30 mole%). An increase in the PbS concentration (40–50 mole%) results in a uniform layer of PbS formed spontaneously, with a thickness of about 10–30 nm on the zirconia substrate containing PbS NCs.
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