Alexey N. Romanov, Zukhra T. Fattakhova, Denis M. Zhigunov, Vladimir N. Korchak, Vladimir B. Sulimov. On the origin of near-IR luminescence in Bi-doped materials (I). Generation of low-valence bismuth species by Bi3+ and Bi0 synproportionation // Opt. Mater. 2010, doi:10.1016/j.optmat.2010.11.019
Creation of bismuth-containing near-infrared (NIR) luminescent centers by synproportionation reaction of Bi3+ and Bi0 was demonstrated in borate and phosphate glasses. This finding is discussed in the light of low-valence nature of bismuth NIR-luminescent centers. The experimental data is consistent with the hypothesis of univalent Bi+ (and, possible, subvalent cluster Bi ions) as a source of NIR luminescence. The dependence of Bi luminescent centers stability on oxoacidity of glass melts was discussed.
Bismuth-doped materials, Subvalent bismuth, Univalent bismuth