Influence of samarium on optical absorption in thin films of the solid electrolyte RbAg4I5 |
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Authors: | A L Despotuli L A Despotuli |
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Institution: | (1) Institute of Problems in the Technology of Microelectronics and High-Purity Materials, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Province, Russia |
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Abstract: | The fundamental optical absorption of films of the solid electrolyte RbAg4I5 electrolyte films decreases (by approximately 25%) after vacuum evaporation of Sm films onto them, and a broad strong-absorption
band with a maximum at 2.4 eV appears within the bad gap. The films bleach after 5–10 days in dry air. The observed phenomena
are attributed to a high concentration (∼3×1020 cm−3) of point defects, including F-centers, in nonstoichiometric RbAg4I5:Sm, and also to the oxidation of Sm. In colored films the ionic conductivity is σ⋍0.9σ
0, and in bleached films it is close to the initial value σ
0.
Fiz. Tverd. Tela (St. Petersburg) 39, 1544–1547 (September 1997) |
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Keywords: | |
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