Optical and thermal reducing of photochromic effect in Al doped Bi₁₂SiO₂₀ crystals
Results of experimental studying the processes of reversible optical and thermal reducing of the photochromic effect in Bi₁₂SiO₂₀:Al crystals are presented. It is shown that the optical reducing is the most effective in the region hν = 0.5 - 2 eV and at hν > 1.4 eV the reducing process passes to...
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| Date: | 2016 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
НТК «Інститут монокристалів» НАН України
2016
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| Series: | Functional Materials |
| Subjects: | |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/120608 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Optical and thermal reducing of photochromic effect in Al doped Bi₁₂SiO₂₀ crystals / A.A. Dyachenko, T.V. Panchenko // Functional Materials. — 2016. — Т. 23, № 2. — С. 197-201.. — Бібліогр.: 16 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Results of experimental studying the processes of reversible optical and thermal reducing of the photochromic effect in Bi₁₂SiO₂₀:Al crystals are presented. It is shown that the optical reducing is the most effective in the region hν = 0.5 - 2 eV and at hν > 1.4 eV the reducing process passes to excitation of the photochromic effect. The thermal reducing is held in two steps with the ultimate bleaching at Th = 152 and 208 K. It is suggested the model of electron transitions such as impurity level - band , where nonstoichiometric ions Bi⁵⁺Si (donors) and ions Al³⁺Si (acceptors) are responsible for impurity levels. Besides intracenter transitions in complexes [AlSiO₄] make a contribution to the processes of exiting and reducing of the photochromic effect. |
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