Cathodoluminescence spectrum of Europium-doped yttrium oxide particle measured with Vulcan system. Europium ion d-to-f interband transitions produce narrow emission lines; excellent energy resolution of Vulcan™ system resolves two spectral peaks with peak-to-peak separation of only 1.6 meV. Methods Acquired using JEOL 2100F STEM mode 200 kV Room temperature.
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