Abstract
PbTe-doped silica and borosilicate glasses with the particle size ranging from 2 to 15 nm were prepared by the sol-gel method. Under a reducing H2 gas atmosphere, PbTe microcrystalline phase was produced at a temperature of about 400°C via the initial Te crystalline phase formed at a low temperature, around 300°C. In borosilicate glasses, PbTe microcrystals were found to have a higher growth rate than in silica glasses. The absorption edge was shifted from the infrared to near visible range with a decrease in particle size due to the quantum-size confinement effect.
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Li, G., Nogami, M. Formation of quantum-size PbTe microcrystals in sol-gel derived silica and borosilicate glasses. J Sol-Gel Sci Technol 1, 79–83 (1993). https://doi.org/10.1007/BF00486431
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DOI: https://doi.org/10.1007/BF00486431