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- W2060663670 abstract "Erbium-doped sol–gel films with different Er concentrations were formed by spin-coating a solution of erbium-nitrate, tetra-ethoxy-silane (TEOS), ethanol, water and HCl on a Si substrate. Refractive index, film thickness and composition were measured as a function of Er concentration. The Er/Si ratio in the film is roughly proportional to the Er/Si ratio in solution, while the Si/O ratio varies with the Er concentration. The film thickness increases with increasing Er concentration, which is attributed to the increased viscosity of the spin-coat solution compared to pure SiO2. All films show a lower refractive index and atomic density than pure SiO2, which is ascribed to a slightly porous structure. After annealing at 750 °C in vacuum the films show clear room-temperature luminescence at 1.53 μm from Er3+. The luminescence lifetime is rather constant (10–12 ms) up to Er concentrations of 1.0 at.%. The luminescence lifetime reduces significantly if annealing is performed in air rather than in vacuum." @default.
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- W2060663670 date "2001-12-01" @default.
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- W2060663670 title "Effects of heat treatment and concentration on the luminescence properties of erbium-doped silica sol–gel films" @default.
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- W2060663670 doi "https://doi.org/10.1016/s0022-3093(01)00903-6" @default.
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