Determination of ionic conductivity in the Bi-Si-O and Pb-Si-O glasses

Abstract

Impedance spectroscopy measurements in various gas atmospheres were carried out in order to explain the doubts about the type of carriers and the mechanism of electrical conductivity in Bi-Si-O and Pb-Si-O glasses. In bismuth silicate glass, a typical ionic conductivity with oxygen ions as charge carriers was observed. The level of electrical conductivity of the glass at 400 °C was 5 × 10-8 S·cm-1, with the activation energy of 1.3 eV and was independent of measuring atmosphere. In the case of lead silicate glasses, the conductivity changed with measuring atmosphere. Two types of charge carriers: oxygen ions and proton ions were postulated. Proton conductivity measured in wet argon at temperature 400 °C was estimated at the level of 4 × 10-8 S·cm-1 while the oxygen ions conductivity in such conditions was 78 × 10-8 S·cm-1. We suggest that both types of charge carriers are transported along the same conduction paths using oxygen defects in the glass structure.

Highly Photoluminescent and Environmentally Stable Perovskite Nanocrystals Templated in Thin Self‐Assembled Block Copolymer Films

“…MAPbBr 3 crystals might be converted into lead silicate phase by RI etching (Figure S10, Supporting Information). The lead silicate phase might be developed due to the decomposition of the perovskite structures followed by the reaction of Pb 2+ ions with oxygen plasma on the Si substrate during RI etching, resulting in the degradation of PL . It should be, however, noted that we utilized RI etching to confirm that the perovskite nanocrystals were successfully templated with the self‐assembled BCP structures by more clearly visualizing crystals buried within BCPs.…”

Effects of d0 and s2 cations on optical properties of silicate glasses

“…The XRD patterns shown in Figure 72 and Figure 73 do not show Bragg diffraction peaks within the resolution of the instrument, confirming the amorphous nature of the glasses produced. These diffraction traces are similar to those shown in other SLS [124,316] and lead crystal type glasses [332]. There is a shift in °2θ between 2.50mol% PbO SLS and 7.50mol% PbO SLS, indicating a volume increase in this glass system.…”