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Color Tunable Upconversion Emission in

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Upconversion emission of Yb, Er co‐doped Bi4Ti3O12 (Bi4Ti3O12: Yb, Er) inverse opal photonic crystals was investigated. Strong green (548 nm) and red (660 nm) upconversion emission bands were observed under a 980 nm excitation at room temperature. The results showed that the intensity of upconversion emission bands can be tuned by controlling the structure of the inverse opal. Significant suppression of the green or red upconversion emission was obtained if the photonic band gap overlaps with the Er3+ ions emission band, resulting in color tunable up‐conversion photonic crystals with applications in solid‐state color displays.
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Document Type: Research Article

Publication date: August 1, 2011

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