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The structural and optical properties of the ZnO and Zn_{0.99}O:Eu³⁺ powders synthesized by the hydrothermal method at two different temperatures (150°C and 250°C) were studied. The ZnO and Zn_{0.99}O:0.01Eu³⁺ powders synthesized at 150 and 250°C showed rod- and flower-like morphologies, respectively. The as-synthesized and annealed ZnO and Zn_{0.99}O:0.01Eu³⁺ powders formed the wurtzite crystal structure...
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