Photochromic Properties of the Doped Bi₁₂SiO₂₀ Crystals

The correlation between photochromic effect and the effect of inducing the photoconductivity in undoped and Al-, Ga-, Sn-, Cr-, Mn-, V-, Fe-, Cu-, Ag-, Mo-doped Bi ₁₂ SiO ₂₀ single crystals have been investigated. It is shown that the photochromic effect is conditioned by the intra-center optical transitions in deep centers, while the effect of inducing the doped photoconductivity is conditioned by filling of the shallow levels in forbidden zone. Characteristic peculiarities of doped ions influence on the photochromic properties of Bi ₁₂ SiO ₂₀ crystals are studied.

Keywords:

• Photochromic effect
• doped Bi₁₂SiO₂₀ crystals
• doping ions
• inducing the doped photoconductivity