Abstract Multicolored luminescence tuning in a single rare earth ion (Er3+) activated rare earth oxide phosphors were achieved among green to red colors. The emission bands in visible light region corresponding to the transitions between 4F7/2 → 4I15/2 (487 nm), 2H11/2 → 4I15/2 (525 nm), 4S3/2 → 4I15/2 (550 nm) and 4F9/2 → 4I15/2 (667 nm) were demonstrated by luminescence spectroscopy under excitations at 379 nm and 980 nm. The dependence of upconversion/downconversion luminescence intensity on the firing temperature and Er3+ concentration were investigated, which is useful to tailor the color chromaticity coordinates under varied excitation wavelengths by adjusting the experimental conditions.

中文翻译：

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紫外至近红外激发下颜色可调 Gd2O3:Er3+ 荧光粉的上转换/下转换发光

摘要 在绿色到红色之间实现了单个稀土离子 (Er3+) 激活的稀土氧化物荧光粉的多色发光调谐。可见光区的发射带对应于 4F7/2 → 4I15/2 (487 nm)、2H11/2 → 4I15/2 (525 nm)、4S3/2 → 4I15/2 (550 nm) 和 4F9/ 2 → 4I15/2 (667 nm) 通过在 379 nm 和 980 nm 激发下的发光光谱证明。研究了上转换/下转换发光强度对烧制温度和 Er3+ 浓度的依赖性，这有助于通过调整实验条件来定制不同激发波长下的色度坐标。